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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics.meta

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+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputActionsEditorSessionAnalytic.cs

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+#if UNITY_EDITOR
+using System;
+using UnityEditor;
+using UnityEngine.InputSystem.LowLevel;
+using UnityEngine.Serialization;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Analytics record for tracking engagement with Input Action Asset editor(s).
+    /// </summary>
+#if UNITY_2023_2_OR_NEWER
+    [UnityEngine.Analytics.AnalyticInfo(eventName: kEventName, maxEventsPerHour: kMaxEventsPerHour,
+        maxNumberOfElements: kMaxNumberOfElements, vendorKey: UnityEngine.InputSystem.InputAnalytics.kVendorKey)]
+#endif // UNITY_2023_2_OR_NEWER
+    internal class InputActionsEditorSessionAnalytic : UnityEngine.InputSystem.InputAnalytics.IInputAnalytic
+    {
+        public const string kEventName = "input_actionasset_editor_closed";
+        public const int kMaxEventsPerHour = 100;     // default: 1000
+        public const int kMaxNumberOfElements = 100;     // default: 1000
+
+        /// <summary>
+        /// Construct a new <c>InputActionsEditorSession</c> record of the given <para>type</para>.
+        /// </summary>
+        /// <param name="kind">The editor type for which this record is valid.</param>
+        public InputActionsEditorSessionAnalytic(Data.Kind kind)
+        {
+            if (kind == Data.Kind.Invalid)
+                throw new ArgumentException(nameof(kind));
+
+            Initialize(kind);
+        }
+
+        /// <summary>
+        /// Register that an action map edit has occurred.
+        /// </summary>
+        public void RegisterActionMapEdit()
+        {
+            if (ImplicitFocus())
+                ++m_Data.action_map_modification_count;
+        }
+
+        /// <summary>
+        /// Register that an action edit has occurred.
+        /// </summary>
+        public void RegisterActionEdit()
+        {
+            if (ImplicitFocus() && ComputeDuration() > 0.5) // Avoid logging actions triggered via UI initialization
+                ++m_Data.action_modification_count;
+        }
+
+        /// <summary>
+        /// Register than a binding edit has occurred.
+        /// </summary>
+        public void RegisterBindingEdit()
+        {
+            if (ImplicitFocus())
+                ++m_Data.binding_modification_count;
+        }
+
+        /// <summary>
+        /// Register that a control scheme edit has occurred.
+        /// </summary>
+        public void RegisterControlSchemeEdit()
+        {
+            if (ImplicitFocus())
+                ++m_Data.control_scheme_modification_count;
+        }
+
+        /// <summary>
+        /// Register that the editor has received focus which is expected to reflect that the user
+        /// is currently exploring or editing it.
+        /// </summary>
+        public void RegisterEditorFocusIn()
+        {
+            if (!hasSession || hasFocus)
+                return;
+
+            m_FocusStart = currentTime;
+        }
+
+        /// <summary>
+        /// Register that the editor has lost focus which is expected to reflect that the user currently
+        /// has the attention elsewhere.
+        /// </summary>
+        /// <remarks>
+        /// Calling this method without having an ongoing session and having focus will not have any effect.
+        /// </remarks>
+        public void RegisterEditorFocusOut()
+        {
+            if (!hasSession || !hasFocus)
+                return;
+
+            var duration = currentTime - m_FocusStart;
+            m_FocusStart = float.NaN;
+            m_Data.session_focus_duration_seconds += (float)duration;
+            ++m_Data.session_focus_switch_count;
+        }
+
+        /// <summary>
+        /// Register a user-event related to explicitly saving in the editor, e.g.
+        /// using a button, menu or short-cut to trigger the save command.
+        /// </summary>
+        public void RegisterExplicitSave()
+        {
+            if (!hasSession)
+                return;     // No pending session
+
+            ++m_Data.explicit_save_count;
+        }
+
+        /// <summary>
+        /// Register a user-event related to implicitly saving in the editor, e.g.
+        /// by having auto-save enabled and indirectly saving the associated asset.
+        /// </summary>
+        public void RegisterAutoSave()
+        {
+            if (!hasSession)
+                return;     // No pending session
+
+            ++m_Data.auto_save_count;
+        }
+
+        /// <summary>
+        /// Register a user-event related to resetting the editor action configuration to defaults.
+        /// </summary>
+        public void RegisterReset()
+        {
+            if (!hasSession)
+                return;     // No pending session
+
+            ++m_Data.reset_count;
+        }
+
+        /// <summary>
+        /// Begins a new session if the session has not already been started.
+        /// </summary>
+        /// <remarks>
+        /// If the session has already been started due to a previous call to <see cref="Begin()"/> without
+        /// a call to <see cref="End()"/> this method has no effect.
+        /// </remarks>
+        public void Begin()
+        {
+            if (hasSession)
+                return;     // Session already started.
+
+            m_SessionStart = currentTime;
+        }
+
+        /// <summary>
+        /// Ends the current session.
+        /// </summary>
+        /// <remarks>
+        /// If the session has not previously been started via a call to <see cref="Begin()"/> calling this
+        /// method has no effect.
+        /// </remarks>
+        public void End()
+        {
+            if (!hasSession)
+                return;     // No pending session
+
+            // Make sure we register focus out if failed to capture or not invoked
+            if (hasFocus)
+                RegisterEditorFocusOut();
+
+            // Compute and record total session duration
+            var duration = ComputeDuration();
+            m_Data.session_duration_seconds += duration;
+
+            // Sanity check data, if less than a second its likely a glitch so avoid sending incorrect data
+            // Send analytics event
+            if (duration >= 1.0)
+                runtime.SendAnalytic(this);
+
+            // Reset to allow instance to be reused
+            Initialize(m_Data.kind);
+        }
+
+        #region IInputAnalytic Interface
+
+#if UNITY_2023_2_OR_NEWER
+        public bool TryGatherData(out UnityEngine.Analytics.IAnalytic.IData data, out Exception error)
+#else
+        public bool TryGatherData(out InputAnalytics.IInputAnalyticData data, out Exception error)
+#endif
+        {
+            if (!isValid)
+            {
+                data = null;
+                error = new Exception("Unable to gather data without a valid session");
+                return false;
+            }
+
+            data = this.m_Data;
+            error = null;
+            return true;
+        }
+
+        public InputAnalytics.InputAnalyticInfo info => new InputAnalytics.InputAnalyticInfo(kEventName, kMaxEventsPerHour, kMaxNumberOfElements);
+
+        #endregion
+
+        private double ComputeDuration() => hasSession ? currentTime - m_SessionStart : 0.0;
+
+        private void Initialize(Data.Kind kind)
+        {
+            m_FocusStart = float.NaN;
+            m_SessionStart = float.NaN;
+
+            m_Data = new Data(kind);
+        }
+
+        private bool ImplicitFocus()
+        {
+            if (!hasSession)
+                return false;
+            if (!hasFocus)
+                RegisterEditorFocusIn();
+            return true;
+        }
+
+        private Data m_Data;
+        private double m_FocusStart;
+        private double m_SessionStart;
+
+        private static IInputRuntime runtime => InputSystem.s_Manager.m_Runtime;
+        private bool hasFocus => !double.IsNaN(m_FocusStart);
+        private bool hasSession => !double.IsNaN(m_SessionStart);
+        // Returns current time since startup. Note that IInputRuntime explicitly defines in interface that
+        // IInputRuntime.currentTime corresponds to EditorApplication.timeSinceStartup in editor.
+        private double currentTime => runtime.currentTime;
+        private bool isValid => m_Data.session_duration_seconds >= 0;
+
+        [Serializable]
+        public struct Data : UnityEngine.InputSystem.InputAnalytics.IInputAnalyticData
+        {
+            /// <summary>
+            /// Represents an editor type.
+            /// </summary>
+            /// <remarks>
+            /// This may be added to in the future but items may never be removed.
+            /// </remarks>
+            [Serializable]
+            public enum Kind
+            {
+                Invalid = 0,
+                EditorWindow = 1,
+                EmbeddedInProjectSettings = 2
+            }
+
+            /// <summary>
+            /// Constructs a <c>InputActionsEditorSessionData</c>.
+            /// </summary>
+            /// <param name="kind">Specifies the kind of editor metrics is being collected for.</param>
+            public Data(Kind kind)
+            {
+                this.kind = kind;
+                session_duration_seconds = 0;
+                session_focus_duration_seconds = 0;
+                session_focus_switch_count = 0;
+                action_map_modification_count = 0;
+                action_modification_count = 0;
+                binding_modification_count = 0;
+                explicit_save_count = 0;
+                auto_save_count = 0;
+                reset_count = 0;
+                control_scheme_modification_count = 0;
+            }
+
+            /// <summary>
+            /// Specifies what kind of Input Actions editor this event represents.
+            /// </summary>
+            public Kind kind;
+
+            /// <summary>
+            /// The total duration for the session, i.e. the duration during which the editor window was open.
+            /// </summary>
+            public double session_duration_seconds;
+
+            /// <summary>
+            /// The total duration for which the editor window was open and had focus.
+            /// </summary>
+            public double session_focus_duration_seconds;
+
+            /// <summary>
+            /// Specifies the number of times the window has transitioned from not having focus to having focus in a single session.
+            /// </summary>
+            public int session_focus_switch_count;
+
+            /// <summary>
+            /// The total number of action map modifications during the session.
+            /// </summary>
+            public int action_map_modification_count;
+
+            /// <summary>
+            /// The total number of action modifications during the session.
+            /// </summary>
+            public int action_modification_count;
+
+            /// The total number of binding modifications during the session.
+            /// </summary>
+            public int binding_modification_count;
+
+            /// <summary>
+            /// The total number of controls scheme modifications during the session.
+            /// </summary>
+            public int control_scheme_modification_count;
+
+            /// <summary>
+            /// The total number of explicit saves during the session, i.e. as in user-initiated save.
+            /// </summary>
+            public int explicit_save_count;
+
+            /// <summary>
+            /// The total number of automatic saves during the session, i.e. as in auto-save on close or focus-lost.
+            /// </summary>
+            public int auto_save_count;
+
+            /// <summary>
+            /// The total number of user-initiated resets during the session, i.e. as in using Reset option in menu.
+            /// </summary>
+            public int reset_count;
+
+            public bool isValid => kind != Kind.Invalid && session_duration_seconds >= 0;
+        }
+    }
+}
+#endif

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputActionsEditorSessionAnalytic.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputBuildAnalytic.cs

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+#if UNITY_EDITOR
+using System;
+using UnityEditor;
+using UnityEditor.Build;
+using UnityEditor.Build.Content;
+using UnityEditor.Build.Reporting;
+using UnityEngine.Serialization;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Analytics for tracking Player Input component user engagement in the editor.
+    /// </summary>
+#if UNITY_2023_2_OR_NEWER
+    [UnityEngine.Analytics.AnalyticInfo(eventName: kEventName, maxEventsPerHour: kMaxEventsPerHour,
+        maxNumberOfElements: kMaxNumberOfElements, vendorKey: UnityEngine.InputSystem.InputAnalytics.kVendorKey)]
+#endif // UNITY_2023_2_OR_NEWER
+    internal class InputBuildAnalytic : UnityEngine.InputSystem.InputAnalytics.IInputAnalytic
+    {
+        public const string kEventName = "input_build_completed";
+        public const int kMaxEventsPerHour = 100; // default: 1000
+        public const int kMaxNumberOfElements = 100; // default: 1000
+
+        private readonly BuildReport m_BuildReport;
+
+        public InputBuildAnalytic(BuildReport buildReport)
+        {
+            m_BuildReport = buildReport;
+        }
+
+        public InputAnalytics.InputAnalyticInfo info =>
+            new InputAnalytics.InputAnalyticInfo(kEventName, kMaxEventsPerHour, kMaxNumberOfElements);
+
+#if UNITY_2023_2_OR_NEWER
+        public bool TryGatherData(out UnityEngine.Analytics.IAnalytic.IData data, out Exception error)
+#else
+        public bool TryGatherData(out InputAnalytics.IInputAnalyticData data, out Exception error)
+#endif
+        {
+            InputSettings defaultSettings = null;
+            try
+            {
+                defaultSettings = ScriptableObject.CreateInstance<InputSettings>();
+                data = new InputBuildAnalyticData(m_BuildReport, InputSystem.settings, defaultSettings);
+                error = null;
+                return true;
+            }
+            catch (Exception e)
+            {
+                data = null;
+                error = e;
+                return false;
+            }
+            finally
+            {
+                if (defaultSettings != null)
+                    Object.DestroyImmediate(defaultSettings);
+            }
+        }
+
+        /// <summary>
+        /// Input system build analytics data structure.
+        /// </summary>
+        [Serializable]
+        internal struct InputBuildAnalyticData : UnityEngine.InputSystem.InputAnalytics.IInputAnalyticData
+        {
+            #region InputSettings
+
+            [Serializable]
+            public enum UpdateMode
+            {
+                ProcessEventsInBothFixedAndDynamicUpdate = 0, // Note: Deprecated
+                ProcessEventsInDynamicUpdate = 1,
+                ProcessEventsInFixedUpdate = 2,
+                ProcessEventsManually = 3,
+            }
+
+            [Serializable]
+            public enum BackgroundBehavior
+            {
+                ResetAndDisableNonBackgroundDevices = 0,
+                ResetAndDisableAllDevices = 1,
+                IgnoreFocus = 2
+            }
+
+            [Serializable]
+            public enum EditorInputBehaviorInPlayMode
+            {
+                PointersAndKeyboardsRespectGameViewFocus = 0,
+                AllDevicesRespectGameViewFocus = 1,
+                AllDeviceInputAlwaysGoesToGameView = 2
+            }
+
+            [Serializable]
+            public enum InputActionPropertyDrawerMode
+            {
+                Compact = 0,
+                MultilineEffective = 1,
+                MultilineBoth = 2
+            }
+
+            public InputBuildAnalyticData(BuildReport report, InputSettings settings, InputSettings defaultSettings)
+            {
+                switch (settings.updateMode)
+                {
+                    case 0: // ProcessEventsInBothFixedAndDynamicUpdate (deprecated/removed)
+                        update_mode = UpdateMode.ProcessEventsInBothFixedAndDynamicUpdate;
+                        break;
+                    case InputSettings.UpdateMode.ProcessEventsManually:
+                        update_mode = UpdateMode.ProcessEventsManually;
+                        break;
+                    case InputSettings.UpdateMode.ProcessEventsInDynamicUpdate:
+                        update_mode = UpdateMode.ProcessEventsInDynamicUpdate;
+                        break;
+                    case InputSettings.UpdateMode.ProcessEventsInFixedUpdate:
+                        update_mode = UpdateMode.ProcessEventsInFixedUpdate;
+                        break;
+                    default:
+                        throw new Exception("Unsupported updateMode");
+                }
+
+                switch (settings.backgroundBehavior)
+                {
+                    case InputSettings.BackgroundBehavior.IgnoreFocus:
+                        background_behavior = BackgroundBehavior.IgnoreFocus;
+                        break;
+                    case InputSettings.BackgroundBehavior.ResetAndDisableAllDevices:
+                        background_behavior = BackgroundBehavior.ResetAndDisableAllDevices;
+                        break;
+                    case InputSettings.BackgroundBehavior.ResetAndDisableNonBackgroundDevices:
+                        background_behavior = BackgroundBehavior.ResetAndDisableNonBackgroundDevices;
+                        break;
+                    default:
+                        throw new Exception("Unsupported background behavior");
+                }
+
+                switch (settings.editorInputBehaviorInPlayMode)
+                {
+                    case InputSettings.EditorInputBehaviorInPlayMode.PointersAndKeyboardsRespectGameViewFocus:
+                        editor_input_behavior_in_playmode = EditorInputBehaviorInPlayMode
+                            .PointersAndKeyboardsRespectGameViewFocus;
+                        break;
+                    case InputSettings.EditorInputBehaviorInPlayMode.AllDevicesRespectGameViewFocus:
+                        editor_input_behavior_in_playmode = EditorInputBehaviorInPlayMode
+                            .AllDevicesRespectGameViewFocus;
+                        break;
+                    case InputSettings.EditorInputBehaviorInPlayMode.AllDeviceInputAlwaysGoesToGameView:
+                        editor_input_behavior_in_playmode = EditorInputBehaviorInPlayMode
+                            .AllDeviceInputAlwaysGoesToGameView;
+                        break;
+                    default:
+                        throw new Exception("Unsupported editor background behavior");
+                }
+
+                switch (settings.inputActionPropertyDrawerMode)
+                {
+                    case InputSettings.InputActionPropertyDrawerMode.Compact:
+                        input_action_property_drawer_mode = InputActionPropertyDrawerMode.Compact;
+                        break;
+                    case InputSettings.InputActionPropertyDrawerMode.MultilineBoth:
+                        input_action_property_drawer_mode = InputActionPropertyDrawerMode.MultilineBoth;
+                        break;
+                    case InputSettings.InputActionPropertyDrawerMode.MultilineEffective:
+                        input_action_property_drawer_mode = InputActionPropertyDrawerMode.MultilineEffective;
+                        break;
+                    default:
+                        throw new Exception("Unsupported editor property drawer mode");
+                }
+
+                var inputSystemActions = InputSystem.actions;
+                var actionsPath = inputSystemActions == null ? null : AssetDatabase.GetAssetPath(inputSystemActions);
+                has_projectwide_input_action_asset = !string.IsNullOrEmpty(actionsPath);
+
+                var settingsPath = settings == null ? null : AssetDatabase.GetAssetPath(settings);
+                has_settings_asset = !string.IsNullOrEmpty(settingsPath);
+
+                compensate_for_screen_orientation = settings.compensateForScreenOrientation;
+                default_deadzone_min = settings.defaultDeadzoneMin;
+                default_deadzone_max = settings.defaultDeadzoneMax;
+                default_button_press_point = settings.defaultButtonPressPoint;
+                button_release_threshold = settings.buttonReleaseThreshold;
+                default_tap_time = settings.defaultTapTime;
+                default_slow_tap_time = settings.defaultSlowTapTime;
+                default_hold_time = settings.defaultHoldTime;
+                tap_radius = settings.tapRadius;
+                multi_tap_delay_time = settings.multiTapDelayTime;
+                max_event_bytes_per_update = settings.maxEventBytesPerUpdate;
+                max_queued_events_per_update = settings.maxQueuedEventsPerUpdate;
+                supported_devices = settings.supportedDevices.ToArray();
+                disable_redundant_events_merging = settings.disableRedundantEventsMerging;
+                shortcut_keys_consume_input = settings.shortcutKeysConsumeInput;
+
+                feature_optimized_controls_enabled = settings.IsFeatureEnabled(InputFeatureNames.kUseOptimizedControls);
+                feature_read_value_caching_enabled = settings.IsFeatureEnabled(InputFeatureNames.kUseReadValueCaching);
+                feature_paranoid_read_value_caching_checks_enabled =
+                    settings.IsFeatureEnabled(InputFeatureNames.kParanoidReadValueCachingChecks);
+
+                feature_disable_unity_remote_support =
+                    settings.IsFeatureEnabled(InputFeatureNames.kDisableUnityRemoteSupport);
+                feature_run_player_updates_in_editmode =
+                    settings.IsFeatureEnabled(InputFeatureNames.kRunPlayerUpdatesInEditMode);
+
+                has_default_settings = InputSettings.AreEqual(settings, defaultSettings);
+
+                build_guid = report != null ? report.summary.guid.ToString() : string.Empty; // Allows testing
+            }
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.updateMode"/> and indicates how the project handles updates.
+            /// </summary>
+            public UpdateMode update_mode;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.compensateForScreenOrientation"/> and if true automatically
+            /// adjust rotations when the screen orientation changes.
+            /// </summary>
+            public bool compensate_for_screen_orientation;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.backgroundBehavior"/> which determines what happens when application
+            /// focus changes and how the system handle input while running in the background.
+            /// </summary>
+            public BackgroundBehavior background_behavior;
+
+            // Note: InputSettings.filterNoiseOnCurrent not present since already deprecated when these analytics
+            //       where added.
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.defaultDeadzoneMin"/>
+            /// </summary>
+            public float default_deadzone_min;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.defaultDeadzoneMax"/>
+            /// </summary>
+            public float default_deadzone_max;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.defaultButtonPressPoint"/>
+            /// </summary>
+            public float default_button_press_point;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.buttonReleaseThreshold"/>
+            /// </summary>
+            public float button_release_threshold;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.defaultSlowTapTime"/>
+            /// </summary>
+            public float default_tap_time;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.defaultSlowTapTime"/>
+            /// </summary>
+            public float default_slow_tap_time;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.defaultHoldTime"/>
+            /// </summary>
+            public float default_hold_time;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.tapRadius"/>
+            /// </summary>
+            public float tap_radius;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.multiTapDelayTime"/>
+            /// </summary>
+            public float multi_tap_delay_time;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.editorInputBehaviorInPlayMode"/>
+            /// </summary>
+            public EditorInputBehaviorInPlayMode editor_input_behavior_in_playmode;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.inputActionPropertyDrawerMode"/>
+            /// </summary>
+            public InputActionPropertyDrawerMode input_action_property_drawer_mode;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.maxEventBytesPerUpdate"/>
+            /// </summary>
+            public int max_event_bytes_per_update;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.maxQueuedEventsPerUpdate"/>
+            /// </summary>
+            public int max_queued_events_per_update;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.supportedDevices"/>
+            /// </summary>
+            public string[] supported_devices;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.disableRedundantEventsMerging"/>
+            /// </summary>
+            public bool disable_redundant_events_merging;
+
+            /// <summary>
+            /// Represents <see cref="InputSettings.shortcutKeysConsumeInput"/>
+            /// </summary>
+            public bool shortcut_keys_consume_input;
+
+            #endregion
+
+            #region Feature flag settings
+
+            /// <summary>
+            /// Represents internal feature flag <see cref="InputFeatureNames.kUseOptimizedControls"/> as defined
+            /// in Input System 1.8.x.
+            /// </summary>
+            public bool feature_optimized_controls_enabled;
+
+            /// <summary>
+            /// Represents internal feature flag <see cref="InputFeatureNames.kUseReadValueCaching" /> as defined
+            /// in Input System 1.8.x.
+            /// </summary>
+            public bool feature_read_value_caching_enabled;
+
+            /// <summary>
+            /// Represents internal feature flag <see cref="InputFeatureNames.kParanoidReadValueCachingChecks" />
+            /// as defined in InputSystem 1.8.x.
+            /// </summary>
+            public bool feature_paranoid_read_value_caching_checks_enabled;
+
+            /// <summary>
+            /// Represents internal feature flag <see cref="InputFeatureNames.kDisableUnityRemoteSupport" />
+            /// as defined in InputSystem 1.8.x.
+            /// </summary>
+            public bool feature_disable_unity_remote_support;
+
+            /// <summary>
+            /// Represents internal feature flag <see cref="InputFeatureNames.kRunPlayerUpdatesInEditMode" />
+            /// as defined in InputSystem 1.8.x.
+            /// </summary>
+            public bool feature_run_player_updates_in_editmode;
+
+            #endregion
+
+            #region
+
+            /// <summary>
+            /// Specifies whether the project is using a project-wide input actions asset or not.
+            /// </summary>
+            public bool has_projectwide_input_action_asset;
+
+            /// <summary>
+            /// Specifies whether the project is using a user-provided settings asset or not.
+            /// </summary>
+            public bool has_settings_asset;
+
+            /// <summary>
+            /// Specifies whether the settings asset (if present) of the built project is equal to default settings
+            /// or not. In case of no settings asset this is also true since implicitly using default settings.
+            /// </summary>
+            public bool has_default_settings;
+
+            /// <summary>
+            /// A unique GUID identifying the build.
+            /// </summary>
+            public string build_guid;
+
+            #endregion
+        }
+
+        /// <summary>
+        /// Input System build analytics.
+        /// </summary>
+        internal class ReportProcessor : IPostprocessBuildWithReport
+        {
+            public int callbackOrder => int.MaxValue;
+
+            public void OnPostprocessBuild(BuildReport report)
+            {
+                InputSystem.s_Manager?.m_Runtime?.SendAnalytic(new InputBuildAnalytic(report));
+            }
+        }
+    }
+}
+#endif

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputBuildAnalytic.cs.meta

@@ -0,0 +1,11 @@
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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputComponentEditorAnalytic.cs

@@ -0,0 +1,89 @@
+#if UNITY_EDITOR
+using System;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Enumeration type identifying a Input System MonoBehavior component.
+    /// </summary>
+    [Serializable]
+    internal enum InputSystemComponent
+    {
+        // Feature components
+        PlayerInput = 1,
+        PlayerInputManager = 2,
+        OnScreenStick = 3,
+        OnScreenButton = 4,
+        VirtualMouseInput = 5,
+
+        // Debug components
+        TouchSimulation = 1000,
+
+        // Integration components
+        StandaloneInputModule = 2000,
+        InputSystemUIInputModule = 2001,
+    }
+
+    /// <summary>
+    /// Analytics record for tracking engagement with Input Component editor(s).
+    /// </summary>
+#if UNITY_2023_2_OR_NEWER
+    [UnityEngine.Analytics.AnalyticInfo(eventName: kEventName, maxEventsPerHour: kMaxEventsPerHour,
+        maxNumberOfElements: kMaxNumberOfElements, vendorKey: UnityEngine.InputSystem.InputAnalytics.kVendorKey)]
+#endif // UNITY_2023_2_OR_NEWER
+    internal class InputComponentEditorAnalytic : UnityEngine.InputSystem.InputAnalytics.IInputAnalytic
+    {
+        public const string kEventName = "input_component_editor_closed";
+        public const int kMaxEventsPerHour = 100; // default: 1000
+        public const int kMaxNumberOfElements = 100; // default: 1000
+
+        /// <summary>
+        /// The associated component type.
+        /// </summary>
+        private readonly InputSystemComponent m_Component;
+
+        /// <summary>
+        /// Represents component inspector editor data.
+        /// </summary>
+        /// <remarks>
+        /// Ideally this struct should be readonly but then Unity cannot serialize/deserialize it.
+        /// </remarks>
+        [Serializable]
+        public struct Data : UnityEngine.InputSystem.InputAnalytics.IInputAnalyticData
+        {
+            /// <summary>
+            /// Creates a new <c>ComponentEditorData</c> instance.
+            /// </summary>
+            /// <param name="component">The associated component.</param>
+            public Data(InputSystemComponent component)
+            {
+                this.component = component;
+            }
+
+            /// <summary>
+            /// Defines the associated component.
+            /// </summary>
+            public InputSystemComponent component;
+        }
+
+        public InputComponentEditorAnalytic(InputSystemComponent component)
+        {
+            info = new InputAnalytics.InputAnalyticInfo(kEventName, kMaxEventsPerHour, kMaxNumberOfElements);
+            m_Component = component;
+        }
+
+#if UNITY_2023_2_OR_NEWER
+        public bool TryGatherData(out UnityEngine.Analytics.IAnalytic.IData data, out Exception error)
+#else
+        public bool TryGatherData(out InputAnalytics.IInputAnalyticData data, out Exception error)
+#endif
+        {
+            data = new Data(m_Component);
+            error = null;
+            return true;
+        }
+
+        public InputAnalytics.InputAnalyticInfo info { get; }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputComponentEditorAnalytic.cs.meta

@@ -0,0 +1,11 @@
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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputEditorAnalytics.cs

@@ -0,0 +1,46 @@
+#if UNITY_EDITOR
+
+using System;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal static class InputEditorAnalytics
+    {
+        /// <summary>
+        /// Represents notification behavior setting associated with <see cref="PlayerInput"/> and
+        /// <see cref="PlayerInputManager"/>.
+        /// </summary>
+        internal enum PlayerNotificationBehavior
+        {
+            SendMessages = 0,
+            BroadcastMessages = 1,
+            UnityEvents = 2,
+            CSharpEvents = 3
+        }
+
+        /// <summary>
+        /// Converts from current <see cref="PlayerNotifications"/> type to analytics counterpart.
+        /// </summary>
+        /// <param name="value">The value to be converted.</param>
+        /// <returns></returns>
+        /// <exception cref="ArgumentOutOfRangeException">If there is no available remapping.</exception>
+        internal static PlayerNotificationBehavior ToNotificationBehavior(PlayerNotifications value)
+        {
+            switch (value)
+            {
+                case PlayerNotifications.SendMessages:
+                    return PlayerNotificationBehavior.SendMessages;
+                case PlayerNotifications.BroadcastMessages:
+                    return PlayerNotificationBehavior.BroadcastMessages;
+                case PlayerNotifications.InvokeUnityEvents:
+                    return PlayerNotificationBehavior.UnityEvents;
+                case PlayerNotifications.InvokeCSharpEvents:
+                    return PlayerNotificationBehavior.CSharpEvents;
+                default:
+                    throw new ArgumentOutOfRangeException(nameof(value));
+            }
+        }
+    }
+}
+
+#endif

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputEditorAnalytics.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputExitPlayModeAnalytic.cs

@@ -0,0 +1,165 @@
+#if UNITY_EDITOR
+
+using System;
+using UnityEditor;
+using UnityEngine.Serialization;
+
+namespace UnityEngine.InputSystem.Editor
+{
+#if UNITY_2023_2_OR_NEWER
+    [UnityEngine.Analytics.AnalyticInfo(eventName: kEventName, maxEventsPerHour: kMaxEventsPerHour,
+        maxNumberOfElements: kMaxNumberOfElements, vendorKey: UnityEngine.InputSystem.InputAnalytics.kVendorKey)]
+#endif // UNITY_2023_2_OR_NEWER
+    internal class InputExitPlayModeAnalytic : UnityEngine.InputSystem.InputAnalytics.IInputAnalytic
+    {
+        public const string kEventName = "input_exit_playmode";
+        public const int kMaxEventsPerHour = 100; // default: 1000
+        public const int kMaxNumberOfElements = 100; // default: 1000
+
+        /// <summary>
+        /// Enumeration type for code authoring APIs mapping to <see cref="InputActionSetupExtensions"/>.
+        /// </summary>
+        /// <remarks>
+        /// This enumeration type may be added to, but NEVER changed, since it would break older data.
+        /// </remarks>
+        public enum Api
+        {
+            AddBinding = 0,
+            AddCompositeBinding = 1,
+            ChangeBinding = 2,
+            ChangeCompositeBinding = 3,
+            Rename = 4,
+            AddControlScheme = 5,
+            RemoveControlScheme = 6,
+            ControlSchemeWithBindingGroup = 7,
+            ControlSchemeWithDevice = 8,
+            ControlSchemeWithRequiredDevice = 9,
+            ControlSchemeWithOptionalDevice = 10,
+            ControlSchemeOrWithRequiredDevice = 11,
+            ControlSchemeOrWithOptionalDevice = 12
+        }
+
+        private static readonly int[] m_Counters = new int[Enum.GetNames(typeof(Api)).Length];
+
+        /// <summary>
+        /// Registers a call to the associated API.
+        /// </summary>
+        /// <param name="api">Enumeration identifying the API.</param>
+        public static void Register(Api api)
+        {
+            if (suppress)
+                return;
+
+            // Note: Currently discards detailed information and only sets a boolean (aggregated) value.
+            ++m_Counters[(int)api];
+        }
+
+        /// <summary>
+        /// Suppresses the registration of analytics.
+        /// </summary>
+        /// <remarks>
+        /// May be used to temporarily suppress analytics to avoid false positives from internal usage.
+        /// </remarks>
+        public static bool suppress
+        {
+            get; set;
+        }
+
+        // Cache delegate
+        private static readonly Action<PlayModeStateChange> PlayModeChanged = OnPlayModeStateChange;
+
+        // Note: Internal visibility to simplify unit testing
+        internal static void OnPlayModeStateChange(PlayModeStateChange change)
+        {
+            if (change == PlayModeStateChange.ExitingEditMode)
+            {
+                // Reset all counters when exiting edit mode
+                Array.Clear(m_Counters, 0, m_Counters.Length);
+
+                // Make sure not suppressed
+                suppress = false;
+            }
+            if (change == PlayModeStateChange.ExitingPlayMode)
+            {
+                // Send analytics and unhook delegate when exiting play-mode
+                EditorApplication.playModeStateChanged -= PlayModeChanged;
+                new InputExitPlayModeAnalytic().Send();
+
+                // No reason to not suppress
+                suppress = true;
+            }
+        }
+
+        [InitializeOnEnterPlayMode]
+        private static void Hook()
+        {
+            // Make sure only a single play-mode change delegate is registered
+            EditorApplication.playModeStateChanged -= PlayModeChanged;
+            EditorApplication.playModeStateChanged += PlayModeChanged;
+        }
+
+        private InputExitPlayModeAnalytic()
+        {
+            info = new InputAnalytics.InputAnalyticInfo(kEventName, kMaxEventsPerHour, kMaxNumberOfElements);
+        }
+
+        /// <summary>
+        /// Represents data collected when exiting play-mode..
+        /// </summary>
+        /// <remarks>
+        /// Ideally this struct should be readonly but then Unity cannot serialize/deserialize it.
+        /// </remarks>
+        [Serializable]
+        public struct Data : UnityEngine.InputSystem.InputAnalytics.IInputAnalyticData
+        {
+            /// <summary>
+            /// Creates a new <c>Data</c> instance.
+            /// </summary>
+            /// <param name="usesCodeAuthoring">Specifies whether code authoring has been used during play-mode.</param>
+            public Data(bool usesCodeAuthoring)
+            {
+                uses_code_authoring = usesCodeAuthoring;
+            }
+
+            /// <summary>
+            /// Specifies whether code-authoring (Input Action setup via extensions) was used at least once during play-mode.
+            /// </summary>
+            public bool uses_code_authoring;
+        }
+
+#if UNITY_2023_2_OR_NEWER
+        public bool TryGatherData(out UnityEngine.Analytics.IAnalytic.IData data, out Exception error)
+#else
+        public bool TryGatherData(out InputAnalytics.IInputAnalyticData data, out Exception error)
+#endif
+        {
+            try
+            {
+                // Determine aggregated perspective, i.e. was "any" code-authoring API used
+                var usedCodeAuthoringDuringPlayMode = false;
+                for (var i = 0; i < m_Counters.Length; ++i)
+                {
+                    if (m_Counters[i] > 0)
+                    {
+                        usedCodeAuthoringDuringPlayMode = true;
+                        break;
+                    }
+                }
+
+                data = new Data(usedCodeAuthoringDuringPlayMode);
+                error = null;
+                return true;
+            }
+            catch (Exception e)
+            {
+                data = null;
+                error = e;
+                return false;
+            }
+        }
+
+        public InputAnalytics.InputAnalyticInfo info { get; }
+    }
+}
+
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/InputExitPlayModeAnalytic.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/OnScreenStickEditorAnalytic.cs

@@ -0,0 +1,92 @@
+#if UNITY_EDITOR && UNITY_INPUT_SYSTEM_ENABLE_UI
+using System;
+using UnityEngine.InputSystem.OnScreen;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Analytics record for tracking engagement with Input Action Asset editor(s).
+    /// </summary>
+#if UNITY_2023_2_OR_NEWER
+    [UnityEngine.Analytics.AnalyticInfo(eventName: kEventName, maxEventsPerHour: kMaxEventsPerHour,
+        maxNumberOfElements: kMaxNumberOfElements, vendorKey: UnityEngine.InputSystem.InputAnalytics.kVendorKey, version: 2)]
+#endif // UNITY_2023_2_OR_NEWER
+    internal class OnScreenStickEditorAnalytic : UnityEngine.InputSystem.InputAnalytics.IInputAnalytic
+    {
+        public const string kEventName = "input_onscreenstick_editor_destroyed";
+        public const int kMaxEventsPerHour = 100; // default: 1000
+        public const int kMaxNumberOfElements = 100; // default: 1000
+
+        /// <summary>
+        /// Represents select configuration data of interest related to an <see cref="OnScreenStick"/> component.
+        /// </summary>
+        [Serializable]
+        internal struct Data : UnityEngine.InputSystem.InputAnalytics.IInputAnalyticData
+        {
+            public enum OnScreenStickBehaviour
+            {
+                RelativePositionWithStaticOrigin = 0,
+                ExactPositionWithStaticOrigin = 1,
+                ExactPositionWithDynamicOrigin = 2,
+            }
+
+            private static OnScreenStickBehaviour ToBehaviour(OnScreenStick.Behaviour value)
+            {
+                switch (value)
+                {
+                    case OnScreenStick.Behaviour.RelativePositionWithStaticOrigin:
+                        return OnScreenStickBehaviour.RelativePositionWithStaticOrigin;
+                    case OnScreenStick.Behaviour.ExactPositionWithDynamicOrigin:
+                        return OnScreenStickBehaviour.ExactPositionWithDynamicOrigin;
+                    case OnScreenStick.Behaviour.ExactPositionWithStaticOrigin:
+                        return OnScreenStickBehaviour.ExactPositionWithStaticOrigin;
+                    default:
+                        throw new ArgumentOutOfRangeException(nameof(value));
+                }
+            }
+
+            public Data(OnScreenStick value)
+            {
+                behavior = ToBehaviour(value.behaviour);
+                movement_range = value.movementRange;
+                dynamic_origin_range = value.dynamicOriginRange;
+                use_isolated_input_actions = value.useIsolatedInputActions;
+            }
+
+            public OnScreenStickBehaviour behavior;
+            public float movement_range;
+            public float dynamic_origin_range;
+            public bool use_isolated_input_actions;
+        }
+
+        private readonly UnityEditor.Editor m_Editor;
+
+        public OnScreenStickEditorAnalytic(UnityEditor.Editor editor)
+        {
+            m_Editor = editor;
+        }
+
+#if UNITY_2023_2_OR_NEWER
+        public bool TryGatherData(out UnityEngine.Analytics.IAnalytic.IData data, out Exception error)
+#else
+        public bool TryGatherData(out InputAnalytics.IInputAnalyticData data, out Exception error)
+#endif
+        {
+            try
+            {
+                data = new Data(m_Editor.target as OnScreenStick);
+                error = null;
+            }
+            catch (Exception e)
+            {
+                data = null;
+                error = e;
+            }
+            return true;
+        }
+
+        public InputAnalytics.InputAnalyticInfo info =>
+            new InputAnalytics.InputAnalyticInfo(kEventName, kMaxEventsPerHour, kMaxNumberOfElements);
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/OnScreenStickEditorAnalytic.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/PlayerInputEditorAnalytic.cs

@@ -0,0 +1,71 @@
+#if UNITY_EDITOR
+using System;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Analytics for tracking Player Input component user engagement in the editor.
+    /// </summary>
+#if UNITY_2023_2_OR_NEWER
+    [UnityEngine.Analytics.AnalyticInfo(eventName: kEventName, maxEventsPerHour: kMaxEventsPerHour,
+        maxNumberOfElements: kMaxNumberOfElements, vendorKey: UnityEngine.InputSystem.InputAnalytics.kVendorKey)]
+#endif // UNITY_2023_2_OR_NEWER
+    internal class PlayerInputEditorAnalytic : UnityEngine.InputSystem.InputAnalytics.IInputAnalytic
+    {
+        public const string kEventName = "input_playerinput_editor_destroyed";
+        public const int kMaxEventsPerHour = 100; // default: 1000
+        public const int kMaxNumberOfElements = 100; // default: 1000
+
+        private readonly UnityEditor.Editor m_Editor;
+
+        public PlayerInputEditorAnalytic(UnityEditor.Editor editor)
+        {
+            m_Editor = editor;
+        }
+
+        public InputAnalytics.InputAnalyticInfo info =>
+            new InputAnalytics.InputAnalyticInfo(kEventName, kMaxEventsPerHour, kMaxNumberOfElements);
+
+#if UNITY_2023_2_OR_NEWER
+        public bool TryGatherData(out UnityEngine.Analytics.IAnalytic.IData data, out Exception error)
+#else
+        public bool TryGatherData(out InputAnalytics.IInputAnalyticData data, out Exception error)
+#endif
+        {
+            try
+            {
+                data = new Data(m_Editor.target as PlayerInput);
+                error = null;
+            }
+            catch (Exception e)
+            {
+                data = null;
+                error = e;
+            }
+            return true;
+        }
+
+        internal struct Data : UnityEngine.InputSystem.InputAnalytics.IInputAnalyticData
+        {
+            public InputEditorAnalytics.PlayerNotificationBehavior behavior;
+            public bool has_actions;
+            public bool has_default_map;
+            public bool has_ui_input_module;
+            public bool has_camera;
+
+            public Data(PlayerInput playerInput)
+            {
+                behavior = InputEditorAnalytics.ToNotificationBehavior(playerInput.notificationBehavior);
+                has_actions = playerInput.actions != null;
+                has_default_map = playerInput.defaultActionMap != null;
+#if UNITY_INPUT_SYSTEM_ENABLE_UI
+                has_ui_input_module = playerInput.uiInputModule != null;
+#else
+                has_ui_input_module = false;
+#endif
+                has_camera = playerInput.camera != null;
+            }
+        }
+    }
+}
+#endif

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/PlayerInputEditorAnalytic.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/PlayerInputManagerEditorAnalytic.cs

@@ -0,0 +1,84 @@
+#if UNITY_EDITOR
+using System;
+
+namespace UnityEngine.InputSystem.Editor
+{
+#if UNITY_2023_2_OR_NEWER
+    [UnityEngine.Analytics.AnalyticInfo(eventName: kEventName, maxEventsPerHour: kMaxEventsPerHour,
+        maxNumberOfElements: kMaxNumberOfElements, vendorKey: UnityEngine.InputSystem.InputAnalytics.kVendorKey)]
+#endif // UNITY_2023_2_OR_NEWER
+    internal class PlayerInputManagerEditorAnalytic : UnityEngine.InputSystem.InputAnalytics.IInputAnalytic
+    {
+        public const string kEventName = "input_playerinputmanager_editor_destroyed";
+        public const int kMaxEventsPerHour = 100; // default: 1000
+        public const int kMaxNumberOfElements = 100; // default: 1000
+
+        public InputAnalytics.InputAnalyticInfo info =>
+            new InputAnalytics.InputAnalyticInfo(kEventName, kMaxEventsPerHour, kMaxNumberOfElements);
+
+        private readonly UnityEditor.Editor m_Editor;
+
+        public PlayerInputManagerEditorAnalytic(UnityEditor.Editor editor)
+        {
+            m_Editor = editor;
+        }
+
+#if UNITY_2023_2_OR_NEWER
+        public bool TryGatherData(out UnityEngine.Analytics.IAnalytic.IData data, out Exception error)
+#else
+        public bool TryGatherData(out InputAnalytics.IInputAnalyticData data, out Exception error)
+#endif
+        {
+            try
+            {
+                data = new Data(m_Editor.target as PlayerInputManager);
+                error = null;
+            }
+            catch (Exception e)
+            {
+                data = null;
+                error = e;
+            }
+            return true;
+        }
+
+        internal struct Data : UnityEngine.InputSystem.InputAnalytics.IInputAnalyticData
+        {
+            public enum PlayerJoinBehavior
+            {
+                JoinPlayersWhenButtonIsPressed = 0, // default
+                JoinPlayersWhenJoinActionIsTriggered = 1,
+                JoinPlayersManually = 2
+            }
+
+            public InputEditorAnalytics.PlayerNotificationBehavior behavior;
+            public PlayerJoinBehavior join_behavior;
+            public bool joining_enabled_by_default;
+            public int max_player_count;
+
+            public Data(PlayerInputManager value)
+            {
+                behavior = InputEditorAnalytics.ToNotificationBehavior(value.notificationBehavior);
+                join_behavior = ToPlayerJoinBehavior(value.joinBehavior);
+                joining_enabled_by_default = value.joiningEnabled;
+                max_player_count = value.maxPlayerCount;
+            }
+
+            private static PlayerJoinBehavior ToPlayerJoinBehavior(UnityEngine.InputSystem.PlayerJoinBehavior value)
+            {
+                switch (value)
+                {
+                    case UnityEngine.InputSystem.PlayerJoinBehavior.JoinPlayersWhenButtonIsPressed:
+                        return PlayerJoinBehavior.JoinPlayersWhenButtonIsPressed;
+                    case UnityEngine.InputSystem.PlayerJoinBehavior.JoinPlayersWhenJoinActionIsTriggered:
+                        return PlayerJoinBehavior.JoinPlayersWhenJoinActionIsTriggered;
+                    case UnityEngine.InputSystem.PlayerJoinBehavior.JoinPlayersManually:
+                        return PlayerJoinBehavior.JoinPlayersManually;
+                    default:
+                        throw new ArgumentOutOfRangeException(nameof(value));
+                }
+            }
+        }
+    }
+}
+#endif

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/PlayerInputManagerEditorAnalytic.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/VirtualMouseInputEditorAnalytic.cs

@@ -0,0 +1,95 @@
+#if UNITY_EDITOR && UNITY_INPUT_SYSTEM_ENABLE_UI
+using System;
+using UnityEngine.InputSystem.UI;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Analytics record for tracking engagement with Input Action Asset editor(s).
+    /// </summary>
+#if UNITY_2023_2_OR_NEWER
+    [UnityEngine.Analytics.AnalyticInfo(eventName: kEventName, maxEventsPerHour: kMaxEventsPerHour,
+        maxNumberOfElements: kMaxNumberOfElements, vendorKey: UnityEngine.InputSystem.InputAnalytics.kVendorKey)]
+#endif // UNITY_2023_2_OR_NEWER
+    internal class VirtualMouseInputEditorAnalytic : UnityEngine.InputSystem.InputAnalytics.IInputAnalytic
+    {
+        public const string kEventName = "input_virtualmouseinput_editor_destroyed";
+        public const int kMaxEventsPerHour = 100; // default: 1000
+        public const int kMaxNumberOfElements = 100; // default: 1000
+
+        [Serializable]
+        internal struct Data : UnityEngine.InputSystem.InputAnalytics.IInputAnalyticData
+        {
+            /// <summary>
+            /// Maps to <see cref="VirtualMouseInput.cursorMode"/>. Determines which cursor representation to use.
+            /// </summary>
+            public CursorMode cursor_mode;
+
+            /// <summary>
+            /// Maps to <see cref="VirtualMouseInput.cursorSpeed" />. Speed in pixels per second with which to move the cursor.
+            /// </summary>
+            public float cursor_speed;
+
+            /// <summary>
+            /// Maps to <see cref="VirtualMouseInput.cursorMode"/>. Multiplier for values received from <see cref="VirtualMouseInput.scrollWheelAction"/>.
+            /// </summary>
+            public float scroll_speed;
+
+            public enum CursorMode
+            {
+                SoftwareCursor = 0,
+                HardwareCursorIfAvailable = 1
+            }
+
+            private static CursorMode ToCursorMode(VirtualMouseInput.CursorMode value)
+            {
+                switch (value)
+                {
+                    case VirtualMouseInput.CursorMode.SoftwareCursor:
+                        return CursorMode.SoftwareCursor;
+                    case VirtualMouseInput.CursorMode.HardwareCursorIfAvailable:
+                        return CursorMode.HardwareCursorIfAvailable;
+                    default:
+                        throw new ArgumentOutOfRangeException(nameof(value));
+                }
+            }
+
+            public Data(VirtualMouseInput value)
+            {
+                cursor_mode = ToCursorMode(value.cursorMode);
+                cursor_speed = value.cursorSpeed;
+                scroll_speed = value.scrollSpeed;
+            }
+        }
+
+        public InputAnalytics.InputAnalyticInfo info =>
+            new InputAnalytics.InputAnalyticInfo(kEventName, kMaxEventsPerHour, kMaxNumberOfElements);
+
+        private readonly UnityEditor.Editor m_Editor;
+
+        public VirtualMouseInputEditorAnalytic(UnityEditor.Editor editor)
+        {
+            m_Editor = editor;
+        }
+
+#if UNITY_2023_2_OR_NEWER
+        public bool TryGatherData(out UnityEngine.Analytics.IAnalytic.IData data, out Exception error)
+#else
+        public bool TryGatherData(out InputAnalytics.IInputAnalyticData data, out Exception error)
+#endif
+        {
+            try
+            {
+                data = new Data(m_Editor.target as VirtualMouseInput);
+                error = null;
+            }
+            catch (Exception e)
+            {
+                data = null;
+                error = e;
+            }
+            return true;
+        }
+    }
+}
+#endif

Packages/com.unity.inputsystem/InputSystem/Editor/Analytics/VirtualMouseInputEditorAnalytic.cs.meta

@@ -0,0 +1,11 @@
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Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputActionAssetManager.cs

@@ -0,0 +1,249 @@
+#if UNITY_EDITOR
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.IO;
+using UnityEditor;
+
+////TODO: ensure that GUIDs in the asset are unique
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Keeps a reference to the asset being edited and maintains a copy of the asset object
+    /// around for editing.
+    /// </summary>
+    [Serializable]
+    internal class InputActionAssetManager : IDisposable
+    {
+        [SerializeField] private InputActionAsset m_AssetObjectForEditing;
+        [SerializeField] private InputActionAsset m_ImportedAssetObject;
+        [SerializeField] private string m_AssetGUID;
+        [SerializeField] private string m_ImportedAssetJson;
+        [SerializeField] private bool m_IsDirty;
+
+        private SerializedObject m_SerializedObject;
+
+        /// <summary>
+        /// Returns the Asset GUID uniquely identifying the associated imported asset.
+        /// </summary>
+        public string guid => m_AssetGUID;
+
+        /// <summary>
+        /// Returns the current Asset Path for the associated imported asset.
+        /// If the asset have been deleted this will be <c>null</c>.
+        /// </summary>
+        public string path
+        {
+            get
+            {
+                Debug.Assert(!string.IsNullOrEmpty(m_AssetGUID), "Asset GUID is empty");
+                return AssetDatabase.GUIDToAssetPath(m_AssetGUID);
+            }
+        }
+
+        /// <summary>
+        /// Returns the name of the associated imported asset.
+        /// </summary>
+        public string name
+        {
+            get
+            {
+                var asset = importedAsset;
+                if (asset != null)
+                    return asset.name;
+
+                if (!string.IsNullOrEmpty(path))
+                    return Path.GetFileNameWithoutExtension(path);
+
+                return string.Empty;
+            }
+        }
+
+        private InputActionAsset importedAsset
+        {
+            get
+            {
+                // Note that this may be null after deserialization from domain reload
+                if (m_ImportedAssetObject == null)
+                    LoadImportedObjectFromGuid();
+
+                return m_ImportedAssetObject;
+            }
+        }
+
+        public InputActionAsset editedAsset => m_AssetObjectForEditing; // TODO Remove if redundant
+
+        public Action<bool> onDirtyChanged { get; set; }
+
+        public InputActionAssetManager(InputActionAsset inputActionAsset)
+        {
+            if (inputActionAsset == null)
+                throw new NullReferenceException(nameof(inputActionAsset));
+            m_AssetGUID = EditorHelpers.GetAssetGUID(inputActionAsset);
+            if (m_AssetGUID == null)
+                throw new Exception($"Failed to get asset {inputActionAsset.name} GUID");
+
+            m_ImportedAssetObject = inputActionAsset;
+
+            Initialize();
+        }
+
+        public SerializedObject serializedObject => m_SerializedObject;
+
+        public bool dirty => m_IsDirty;
+
+        public bool Initialize()
+        {
+            if (m_AssetObjectForEditing == null)
+            {
+                if (importedAsset == null)
+                {
+                    // The asset we want to edit no longer exists.
+                    return false;
+                }
+
+                CreateWorkingCopyAsset();
+            }
+            else
+            {
+                m_SerializedObject = new SerializedObject(m_AssetObjectForEditing);
+            }
+
+            return true;
+        }
+
+        public void Dispose()
+        {
+            if (m_SerializedObject == null)
+                return;
+            m_SerializedObject?.Dispose();
+            m_SerializedObject = null;
+        }
+
+        public bool ReInitializeIfAssetHasChanged()
+        {
+            var json = importedAsset.ToJson();
+            if (m_ImportedAssetJson == json)
+                return false;
+
+            CreateWorkingCopyAsset();
+            return true;
+        }
+
+        public static InputActionAsset CreateWorkingCopy(InputActionAsset source)
+        {
+            var copy = Object.Instantiate(source);
+            copy.hideFlags = HideFlags.HideAndDontSave;
+            copy.name = source.name;
+            return copy;
+        }
+
+        public static void CreateWorkingCopyAsset(ref InputActionAsset copy, InputActionAsset source)
+        {
+            if (copy != null)
+                Cleanup(ref copy);
+
+            copy = CreateWorkingCopy(source);
+        }
+
+        private void CreateWorkingCopyAsset() // TODO Can likely be removed if combined with Initialize
+        {
+            if (m_AssetObjectForEditing != null)
+                Cleanup();
+
+            // Duplicate the asset along 1:1. Unlike calling Clone(), this will also preserve GUIDs.
+            var asset = importedAsset;
+            m_AssetObjectForEditing = CreateWorkingCopy(asset);
+            m_ImportedAssetJson = asset.ToJson();
+            m_SerializedObject = new SerializedObject(m_AssetObjectForEditing);
+        }
+
+        public void Cleanup()
+        {
+            Cleanup(ref m_AssetObjectForEditing);
+        }
+
+        public static void Cleanup(ref InputActionAsset asset)
+        {
+            if (asset == null)
+                return;
+
+            Object.DestroyImmediate(asset);
+            asset = null;
+        }
+
+        private void LoadImportedObjectFromGuid()
+        {
+            // https://fogbugz.unity3d.com/f/cases/1313185/
+            // InputActionEditorWindow being an EditorWindow, it will be saved as part of the editor's
+            // window layout. When a project is opened that has no Library/ folder, the layout from the
+            // most recently opened project is used. Which means that when opening an .inputactions
+            // asset in project A, then closing it, and then opening project B, restoring the window layout
+            // also tries to restore the InputActionEditorWindow having that very same asset open -- which
+            // will lead nowhere except there happens to be an InputActionAsset with the very same GUID in
+            // the project.
+            var assetPath = path;
+            if (!string.IsNullOrEmpty(assetPath))
+                m_ImportedAssetObject = AssetDatabase.LoadAssetAtPath<InputActionAsset>(assetPath);
+        }
+
+        public void ApplyChanges()
+        {
+            m_SerializedObject.ApplyModifiedProperties();
+            m_SerializedObject.Update();
+        }
+
+        internal void SaveChangesToAsset()
+        {
+            // If this is invoked after a domain reload, importAsset will resolve itself.
+            // However, if the asset do not exist importedAsset will be null and we cannot complete the operation.
+            if (importedAsset == null)
+                throw new Exception("Unable to save changes. Associated asset does not exist.");
+
+            SaveAsset(path, m_AssetObjectForEditing.ToJson());
+            SetDirty(false);
+        }
+
+        /// <summary>
+        /// Saves an asset to the given <c>assetPath</c> with file content corresponding to <c>assetJson</c>
+        /// if the current content of the asset given by <c>assetPath</c> is different or the asset do not exist.
+        /// </summary>
+        /// <param name="assetPath">Destination asset path.</param>
+        /// <param name="assetJson">The JSON file content to be written to the asset.</param>
+        /// <returns><c>true</c> if the asset was successfully modified or created, else <c>false</c>.</returns>
+        internal static bool SaveAsset(string assetPath, string assetJson)
+        {
+            var existingJson = File.Exists(assetPath) ? File.ReadAllText(assetPath) : string.Empty;
+
+            // Return immediately if file content has not changed, i.e. touching the file would not yield a difference.
+            if (assetJson == existingJson)
+                return false;
+
+            // Attempt to write asset to disc (including checkout the file) and inform the user if this fails.
+            if (EditorHelpers.WriteAsset(assetPath, assetJson))
+                return true;
+
+            Debug.LogError($"Unable save asset to \"{assetPath}\" since the asset-path could not be checked-out as editable in the underlying version-control system.");
+            return false;
+        }
+
+        public void MarkDirty()
+        {
+            SetDirty(true);
+        }
+
+        public void UpdateAssetDirtyState()
+        {
+            m_SerializedObject.Update();
+            SetDirty(m_AssetObjectForEditing.ToJson() != importedAsset.ToJson()); // TODO Why not using cached version?
+        }
+
+        private void SetDirty(bool newValue)
+        {
+            m_IsDirty = newValue;
+            if (onDirtyChanged != null)
+                onDirtyChanged(newValue);
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputActionAssetManager.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputActionPropertiesView.cs

@@ -0,0 +1,130 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor;
+using UnityEngine.InputSystem.Controls;
+using UnityEngine.InputSystem.Utilities;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// UI that edits the properties of an <see cref="InputAction"/>.
+    /// </summary>
+    /// <remarks>
+    /// Right-most pane in <see cref="InputActionEditorWindow"/> when an action is selected.
+    /// </remarks>
+    internal class InputActionPropertiesView : PropertiesViewBase
+    {
+        public static FourCC k_PropertiesChanged => new FourCC("PROP");
+
+        public InputActionPropertiesView(SerializedProperty actionProperty, Action<FourCC> onChange = null)
+            : base("Action", actionProperty, onChange, actionProperty.FindPropertyRelative("m_ExpectedControlType").stringValue)
+        {
+            m_ExpectedControlTypeProperty = actionProperty.FindPropertyRelative(nameof(InputAction.m_ExpectedControlType));
+            m_ActionTypeProperty = actionProperty.FindPropertyRelative(nameof(InputAction.m_Type));
+            m_ActionFlagsProperty = actionProperty.FindPropertyRelative(nameof(InputAction.m_Flags));
+
+            m_SelectedActionType = (InputActionType)m_ActionTypeProperty.intValue;
+            m_WantsInitialStateCheck = (m_ActionFlagsProperty.intValue & (int)InputAction.ActionFlags.WantsInitialStateCheck) != 0;
+
+            BuildControlTypeList();
+            m_SelectedControlType = Array.IndexOf(m_ControlTypeList, m_ExpectedControlTypeProperty.stringValue);
+            if (m_SelectedControlType == -1)
+                m_SelectedControlType = 0;
+
+            if (s_ControlTypeLabel == null)
+                s_ControlTypeLabel = EditorGUIUtility.TrTextContent("Control Type", m_ExpectedControlTypeProperty.GetTooltip());
+            if (s_ActionTypeLabel == null)
+                s_ActionTypeLabel = EditorGUIUtility.TrTextContent("Action Type", m_ActionTypeProperty.GetTooltip());
+            if (s_WantsInitialStateCheckLabel == null)
+                s_WantsInitialStateCheckLabel = EditorGUIUtility.TrTextContent("Initial State Check",
+                    "Whether in the next input update after the action was enabled, the action should "
+                    + "immediately trigger if any of its bound controls are currently in a non-default state. "
+                    + "This check happens implicitly for Value actions but can be explicitly enabled for Button and Pass-Through actions.");
+        }
+
+        protected override void DrawGeneralProperties()
+        {
+            EditorGUI.BeginChangeCheck();
+
+            m_SelectedActionType = EditorGUILayout.EnumPopup(s_ActionTypeLabel, m_SelectedActionType);
+            if ((InputActionType)m_SelectedActionType != InputActionType.Button)
+                m_SelectedControlType = EditorGUILayout.Popup(s_ControlTypeLabel, m_SelectedControlType, m_ControlTypeOptions);
+
+            if ((InputActionType)m_SelectedActionType != InputActionType.Value)
+                m_WantsInitialStateCheck = EditorGUILayout.Toggle(s_WantsInitialStateCheckLabel, m_WantsInitialStateCheck);
+
+            if (EditorGUI.EndChangeCheck())
+            {
+                if ((InputActionType)m_SelectedActionType == InputActionType.Button)
+                    m_ExpectedControlTypeProperty.stringValue = "Button";
+                else if (m_SelectedControlType == 0)
+                    m_ExpectedControlTypeProperty.stringValue = string.Empty;
+                else
+                    m_ExpectedControlTypeProperty.stringValue = m_ControlTypeList[m_SelectedControlType];
+
+                m_ActionTypeProperty.intValue = (int)(InputActionType)m_SelectedActionType;
+
+                if (m_WantsInitialStateCheck)
+                    m_ActionFlagsProperty.intValue |= (int)InputAction.ActionFlags.WantsInitialStateCheck;
+                else
+                    m_ActionFlagsProperty.intValue &= ~(int)InputAction.ActionFlags.WantsInitialStateCheck;
+
+                m_ActionTypeProperty.serializedObject.ApplyModifiedProperties();
+                UpdateProcessors(m_ExpectedControlTypeProperty.stringValue);
+
+                onChange(k_PropertiesChanged);
+            }
+        }
+
+        private void BuildControlTypeList()
+        {
+            var types = new List<string>();
+            var allLayouts = InputSystem.s_Manager.m_Layouts;
+            foreach (var layoutName in allLayouts.layoutTypes.Keys)
+            {
+                if (EditorInputControlLayoutCache.TryGetLayout(layoutName).hideInUI)
+                    continue;
+
+                // If the action type is InputActionType.Value, skip button controls.
+                var type = allLayouts.layoutTypes[layoutName];
+                if ((InputActionType)m_SelectedActionType == InputActionType.Value &&
+                    typeof(ButtonControl).IsAssignableFrom(type))
+                    continue;
+
+                ////TODO: skip aliases
+
+                if (typeof(InputControl).IsAssignableFrom(type) &&
+                    !typeof(InputDevice).IsAssignableFrom(type))
+                {
+                    types.Add(layoutName);
+                }
+            }
+            // Sort alphabetically.
+            types.Sort((a, b) => string.Compare(a, b, StringComparison.OrdinalIgnoreCase));
+            // Make sure "Any" is always topmost entry.
+            types.Insert(0, "Any");
+
+            m_ControlTypeList = types.ToArray();
+            m_ControlTypeOptions = m_ControlTypeList.Select(x => new GUIContent(ObjectNames.NicifyVariableName(x)))
+                .ToArray();
+        }
+
+        private readonly SerializedProperty m_ExpectedControlTypeProperty;
+        private readonly SerializedProperty m_ActionTypeProperty;
+        private readonly SerializedProperty m_ActionFlagsProperty;
+
+        private string m_ExpectedControlLayout;
+        private string[] m_ControlTypeList;
+        private GUIContent[] m_ControlTypeOptions;
+        private int m_SelectedControlType;
+        private Enum m_SelectedActionType;
+        private bool m_WantsInitialStateCheck;
+
+        private static GUIContent s_ActionTypeLabel;
+        private static GUIContent s_ControlTypeLabel;
+        private static GUIContent s_WantsInitialStateCheckLabel;
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputActionPropertiesView.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputActionTreeView.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputActionTreeViewItems.cs

@@ -0,0 +1,569 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using UnityEditor;
+using UnityEditor.IMGUI.Controls;
+using UnityEngine.InputSystem.Utilities;
+
+#if UNITY_6000_2_OR_NEWER
+using TreeViewItem = UnityEditor.IMGUI.Controls.TreeViewItem<int>;
+#endif
+
+////TODO: sync expanded state of SerializedProperties to expanded state of tree (will help preserving expansion in inspector)
+
+////REVIEW: would be great to align all "[device]" parts of binding strings neatly in a column
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal abstract class ActionTreeItemBase : TreeViewItem
+    {
+        public SerializedProperty property { get; }
+        public virtual string expectedControlLayout => string.Empty;
+        public virtual bool canRename => true;
+        public virtual bool serializedDataIncludesChildren => false;
+        public abstract GUIStyle colorTagStyle { get; }
+        public string name { get; }
+        public Guid guid { get; }
+        public virtual bool showWarningIcon => false;
+
+        // For some operations (like copy-paste), we want to include information that we have filtered out.
+        internal List<ActionTreeItemBase> m_HiddenChildren;
+        public bool hasChildrenIncludingHidden => hasChildren || (m_HiddenChildren != null && m_HiddenChildren.Count > 0);
+        public IEnumerable<ActionTreeItemBase> hiddenChildren => m_HiddenChildren ?? Enumerable.Empty<ActionTreeItemBase>();
+        public IEnumerable<ActionTreeItemBase> childrenIncludingHidden
+        {
+            get
+            {
+                if (hasChildren)
+                    foreach (var child in children)
+                        if (child is ActionTreeItemBase item)
+                            yield return item;
+                if (m_HiddenChildren != null)
+                    foreach (var child in m_HiddenChildren)
+                        yield return child;
+            }
+        }
+
+        // Action data is generally stored in arrays. Action maps are stored in m_ActionMaps arrays in assets,
+        // actions are stored in m_Actions arrays on maps and bindings are stored in m_Bindings arrays on maps.
+        public SerializedProperty arrayProperty => property.GetArrayPropertyFromElement();
+
+        // Dynamically look up the array index instead of just taking it from `property`.
+        // This makes sure whatever insertions or deletions we perform on the serialized data,
+        // we get the right array index from an item.
+        public int arrayIndex => InputActionSerializationHelpers.GetIndex(arrayProperty, guid);
+
+        protected ActionTreeItemBase(SerializedProperty property)
+        {
+            this.property = property;
+
+            // Look up name.
+            var nameProperty = property.FindPropertyRelative("m_Name");
+            Debug.Assert(nameProperty != null, $"Cannot find m_Name property on {property.propertyPath}");
+            name = nameProperty.stringValue;
+
+            // Look up ID.
+            var idProperty = property.FindPropertyRelative("m_Id");
+            Debug.Assert(idProperty != null, $"Cannot find m_Id property on {property.propertyPath}");
+            var idPropertyString = idProperty.stringValue;
+            if (string.IsNullOrEmpty(idPropertyString))
+            {
+                // This is somewhat questionable but we can't operate if we don't have IDs on the data used in the tree.
+                // Rather than requiring users of the tree to set this up consistently, we assign IDs
+                // on the fly, if necessary.
+                guid = Guid.NewGuid();
+                idPropertyString = guid.ToString();
+                idProperty.stringValue = idPropertyString;
+                idProperty.serializedObject.ApplyModifiedPropertiesWithoutUndo();
+            }
+            else
+            {
+                guid = new Guid(idPropertyString);
+            }
+
+            // All our elements (maps, actions, bindings) carry unique IDs. We use their hash
+            // codes as item IDs in the tree. This should result in stable item IDs that keep
+            // identifying the right item across all reloads and tree mutations.
+            id = guid.GetHashCode();
+        }
+
+        public virtual void Rename(string newName)
+        {
+            Debug.Assert(!canRename, "Item is marked as allowing renames yet does not implement Rename()");
+        }
+
+        /// <summary>
+        /// Delete serialized data for the tree item and its children.
+        /// </summary>
+        public abstract void DeleteData();
+
+        public abstract bool AcceptsDrop(ActionTreeItemBase item);
+
+        /// <summary>
+        /// Get information about where to drop an item of the given type and (optionally) the given index.
+        /// </summary>
+        public abstract bool GetDropLocation(Type itemType, int? childIndex, ref SerializedProperty array, ref int arrayIndex);
+
+        protected static class Styles
+        {
+            private static GUIStyle StyleWithBackground(string fileName)
+            {
+                return new GUIStyle("Label").WithNormalBackground(AssetDatabase.LoadAssetAtPath<Texture2D>($"{InputActionTreeView.SharedResourcesPath}{fileName}.png"));
+            }
+
+            public static readonly GUIStyle yellowRect = StyleWithBackground("yellow");
+            public static readonly GUIStyle greenRect = StyleWithBackground("green");
+            public static readonly GUIStyle blueRect = StyleWithBackground("blue");
+            public static readonly GUIStyle pinkRect = StyleWithBackground("pink");
+        }
+    }
+
+    /// <summary>
+    /// Tree view item for an action map.
+    /// </summary>
+    /// <seealso cref="InputActionMap"/>
+    internal class ActionMapTreeItem : ActionTreeItemBase
+    {
+        public ActionMapTreeItem(SerializedProperty actionMapProperty)
+            : base(actionMapProperty)
+        {
+        }
+
+        public override GUIStyle colorTagStyle => Styles.yellowRect;
+        public SerializedProperty bindingsArrayProperty => property.FindPropertyRelative("m_Bindings");
+        public SerializedProperty actionsArrayProperty => property.FindPropertyRelative("m_Actions");
+        public override bool serializedDataIncludesChildren => true;
+
+        public override void Rename(string newName)
+        {
+            InputActionSerializationHelpers.RenameActionMap(property, newName);
+        }
+
+        public override void DeleteData()
+        {
+            var assetObject = property.serializedObject;
+            if (!(assetObject.targetObject is InputActionAsset))
+                throw new InvalidOperationException(
+                    $"Action map must be part of InputActionAsset but is in {assetObject.targetObject} instead");
+
+            InputActionSerializationHelpers.DeleteActionMap(assetObject, guid);
+        }
+
+        public override bool AcceptsDrop(ActionTreeItemBase item)
+        {
+            return item is ActionTreeItem;
+        }
+
+        public override bool GetDropLocation(Type itemType, int? childIndex, ref SerializedProperty array, ref int arrayIndex)
+        {
+            // Drop actions into action array.
+            if (itemType == typeof(ActionTreeItem))
+            {
+                array = actionsArrayProperty;
+                arrayIndex = childIndex ?? -1;
+                return true;
+            }
+
+            // For action maps in assets, drop other action maps next to them.
+            if (itemType == typeof(ActionMapTreeItem) && property.serializedObject.targetObject is InputActionAsset)
+            {
+                array = property.GetArrayPropertyFromElement();
+                arrayIndex = this.arrayIndex + 1;
+                return true;
+            }
+
+            ////REVIEW: would be nice to be able to replace the entire contents of a map in the inspector by dropping in another map
+
+            return false;
+        }
+
+        public static ActionMapTreeItem AddTo(TreeViewItem parent, SerializedProperty actionMapProperty)
+        {
+            var item = new ActionMapTreeItem(actionMapProperty);
+
+            item.depth = parent.depth + 1;
+            item.displayName = item.name;
+            parent.AddChild(item);
+
+            return item;
+        }
+
+        public void AddActionsTo(TreeViewItem parent)
+        {
+            AddActionsTo(parent, addBindings: false);
+        }
+
+        public void AddActionsAndBindingsTo(TreeViewItem parent)
+        {
+            AddActionsTo(parent, addBindings: true);
+        }
+
+        private void AddActionsTo(TreeViewItem parent, bool addBindings)
+        {
+            var actionsArrayProperty = this.actionsArrayProperty;
+            Debug.Assert(actionsArrayProperty != null, $"Cannot find m_Actions in {property}");
+
+            for (var i = 0; i < actionsArrayProperty.arraySize; i++)
+            {
+                var actionProperty = actionsArrayProperty.GetArrayElementAtIndex(i);
+                var actionItem = ActionTreeItem.AddTo(parent, property, actionProperty);
+
+                if (addBindings)
+                    actionItem.AddBindingsTo(actionItem);
+            }
+        }
+
+        public static void AddActionMapsFromAssetTo(TreeViewItem parent, SerializedObject assetObject)
+        {
+            var actionMapsArrayProperty = assetObject.FindProperty("m_ActionMaps");
+            Debug.Assert(actionMapsArrayProperty != null, $"Cannot find m_ActionMaps in {assetObject}");
+            Debug.Assert(actionMapsArrayProperty.isArray, $"m_ActionMaps in {assetObject} is not an array");
+
+            var mapCount = actionMapsArrayProperty.arraySize;
+            for (var i = 0; i < mapCount; ++i)
+            {
+                var mapProperty = actionMapsArrayProperty.GetArrayElementAtIndex(i);
+                AddTo(parent, mapProperty);
+            }
+        }
+    }
+
+    /// <summary>
+    /// Tree view item for an action.
+    /// </summary>
+    /// <see cref="InputAction"/>
+    internal class ActionTreeItem : ActionTreeItemBase
+    {
+        public ActionTreeItem(SerializedProperty actionMapProperty, SerializedProperty actionProperty)
+            : base(actionProperty)
+        {
+            this.actionMapProperty = actionMapProperty;
+        }
+
+        public SerializedProperty actionMapProperty { get; }
+        public override GUIStyle colorTagStyle => Styles.greenRect;
+        public bool isSingletonAction => actionMapProperty == null;
+
+        public override string expectedControlLayout
+        {
+            get
+            {
+                var expectedControlType = property.FindPropertyRelative("m_ExpectedControlType").stringValue;
+                if (!string.IsNullOrEmpty(expectedControlType))
+                    return expectedControlType;
+
+                var type = property.FindPropertyRelative("m_Type").intValue;
+                if (type == (int)InputActionType.Button)
+                    return "Button";
+
+                return null;
+            }
+        }
+
+        public SerializedProperty bindingsArrayProperty => isSingletonAction
+        ? property.FindPropertyRelative("m_SingletonActionBindings")
+            : actionMapProperty.FindPropertyRelative("m_Bindings");
+
+        // If we're a singleton action (no associated action map property), we include all our bindings in the
+        // serialized data.
+        public override bool serializedDataIncludesChildren => actionMapProperty == null;
+
+        public override void Rename(string newName)
+        {
+            InputActionSerializationHelpers.RenameAction(property, actionMapProperty, newName);
+        }
+
+        public override void DeleteData()
+        {
+            InputActionSerializationHelpers.DeleteActionAndBindings(actionMapProperty, guid);
+        }
+
+        public override bool AcceptsDrop(ActionTreeItemBase item)
+        {
+            return item is BindingTreeItem && !(item is PartOfCompositeBindingTreeItem);
+        }
+
+        public override bool GetDropLocation(Type itemType, int? childIndex, ref SerializedProperty array, ref int arrayIndex)
+        {
+            // Drop bindings into binding array.
+            if (typeof(BindingTreeItem).IsAssignableFrom(itemType))
+            {
+                array = bindingsArrayProperty;
+
+                // Indexing by tree items is relative to each action but indexing in
+                // binding array is global for all actions in a map. Adjust index accordingly.
+                // NOTE: Bindings for any one action need not be stored contiguously in the binding array
+                //       so we can't just add something to the index of the first binding to the action.
+                arrayIndex =
+                    InputActionSerializationHelpers.ConvertBindingIndexOnActionToBindingIndexInArray(
+                        array, name, childIndex ?? -1);
+
+                return true;
+            }
+
+            // Drop other actions next to us.
+            if (itemType == typeof(ActionTreeItem))
+            {
+                array = arrayProperty;
+                arrayIndex = this.arrayIndex + 1;
+                return true;
+            }
+
+            return false;
+        }
+
+        public static ActionTreeItem AddTo(TreeViewItem parent, SerializedProperty actionMapProperty, SerializedProperty actionProperty)
+        {
+            var item = new ActionTreeItem(actionMapProperty, actionProperty);
+
+            item.depth = parent.depth + 1;
+            item.displayName = item.name;
+            parent.AddChild(item);
+
+            return item;
+        }
+
+        /// <summary>
+        /// Add items for the bindings of just this action to the given parent tree item.
+        /// </summary>
+        public void AddBindingsTo(TreeViewItem parent)
+        {
+            var isSingleton = actionMapProperty == null;
+            var bindingsArrayProperty = isSingleton
+                ? property.FindPropertyRelative("m_SingletonActionBindings")
+                : actionMapProperty.FindPropertyRelative("m_Bindings");
+
+            var bindingsCountInMap = bindingsArrayProperty.arraySize;
+            var currentComposite = (CompositeBindingTreeItem)null;
+            for (var i = 0; i < bindingsCountInMap; ++i)
+            {
+                var bindingProperty = bindingsArrayProperty.GetArrayElementAtIndex(i);
+
+                // Skip if binding is not for action.
+                var actionProperty = bindingProperty.FindPropertyRelative("m_Action");
+                Debug.Assert(actionProperty != null, $"Could not find m_Action in {bindingProperty}");
+                if (!actionProperty.stringValue.Equals(name, StringComparison.InvariantCultureIgnoreCase))
+                    continue;
+
+                // See what kind of binding we have.
+                var flagsProperty = bindingProperty.FindPropertyRelative("m_Flags");
+                Debug.Assert(actionProperty != null, $"Could not find m_Flags in {bindingProperty}");
+                var flags = (InputBinding.Flags)flagsProperty.intValue;
+                if ((flags & InputBinding.Flags.PartOfComposite) != 0 && currentComposite != null)
+                {
+                    // Composite part binding.
+                    PartOfCompositeBindingTreeItem.AddTo(currentComposite, bindingProperty);
+                }
+                else if ((flags & InputBinding.Flags.Composite) != 0)
+                {
+                    // Composite binding.
+                    currentComposite = CompositeBindingTreeItem.AddTo(parent, bindingProperty);
+                }
+                else
+                {
+                    // "Normal" binding.
+                    BindingTreeItem.AddTo(parent, bindingProperty);
+                    currentComposite = null;
+                }
+            }
+        }
+    }
+
+    /// <summary>
+    /// Tree view item for a binding.
+    /// </summary>
+    /// <seealso cref="InputBinding"/>
+    internal class BindingTreeItem : ActionTreeItemBase
+    {
+        public BindingTreeItem(SerializedProperty bindingProperty)
+            : base(bindingProperty)
+        {
+            path = property.FindPropertyRelative("m_Path").stringValue;
+            groups = property.FindPropertyRelative("m_Groups").stringValue;
+            action = property.FindPropertyRelative("m_Action").stringValue;
+        }
+
+        public string path { get; }
+        public string groups { get; }
+        public string action { get; }
+        public override bool showWarningIcon => InputSystem.ShouldDrawWarningIconForBinding(path);
+
+        public override bool canRename => false;
+        public override GUIStyle colorTagStyle => Styles.blueRect;
+
+        public string displayPath =>
+            !string.IsNullOrEmpty(path) ? InputControlPath.ToHumanReadableString(path) : "<No Binding>";
+
+        private ActionTreeItem actionItem
+        {
+            get
+            {
+                // Find the action we're under.
+                for (var node = parent; node != null; node = node.parent)
+                    if (node is ActionTreeItem item)
+                        return item;
+                return null;
+            }
+        }
+
+        public override string expectedControlLayout
+        {
+            get
+            {
+                var currentActionItem = actionItem;
+                return currentActionItem != null ? currentActionItem.expectedControlLayout : string.Empty;
+            }
+        }
+
+        public override void DeleteData()
+        {
+            var currentActionItem = actionItem;
+            Debug.Assert(currentActionItem != null, "BindingTreeItem should always have a parent action");
+            var bindingsArrayProperty = currentActionItem.bindingsArrayProperty;
+            InputActionSerializationHelpers.DeleteBinding(bindingsArrayProperty, guid);
+        }
+
+        public override bool AcceptsDrop(ActionTreeItemBase item)
+        {
+            return false;
+        }
+
+        public override bool GetDropLocation(Type itemType, int? childIndex, ref SerializedProperty array, ref int arrayIndex)
+        {
+            // Drop bindings next to us.
+            if (typeof(BindingTreeItem).IsAssignableFrom(itemType))
+            {
+                array = arrayProperty;
+                arrayIndex = this.arrayIndex + 1;
+                return true;
+            }
+
+            return false;
+        }
+
+        public static BindingTreeItem AddTo(TreeViewItem parent, SerializedProperty bindingProperty)
+        {
+            var item = new BindingTreeItem(bindingProperty);
+
+            item.depth = parent.depth + 1;
+            item.displayName = item.displayPath;
+            parent.AddChild(item);
+
+            return item;
+        }
+    }
+
+    /// <summary>
+    /// Tree view item for a composite binding.
+    /// </summary>
+    /// <seealso cref="InputBinding.isComposite"/>
+    internal class CompositeBindingTreeItem : BindingTreeItem
+    {
+        public CompositeBindingTreeItem(SerializedProperty bindingProperty)
+            : base(bindingProperty)
+        {
+        }
+
+        public override GUIStyle colorTagStyle => Styles.blueRect;
+        public override bool canRename => true;
+
+        public string compositeName => NameAndParameters.ParseName(path);
+
+        public override void Rename(string newName)
+        {
+            InputActionSerializationHelpers.RenameComposite(property, newName);
+        }
+
+        public override bool AcceptsDrop(ActionTreeItemBase item)
+        {
+            return item is PartOfCompositeBindingTreeItem;
+        }
+
+        public override bool GetDropLocation(Type itemType, int? childIndex, ref SerializedProperty array, ref int arrayIndex)
+        {
+            // Drop part binding into composite.
+            if (itemType == typeof(PartOfCompositeBindingTreeItem))
+            {
+                array = arrayProperty;
+
+                // Adjust child index by index of composite item itself.
+                arrayIndex = childIndex != null
+                    ? this.arrayIndex + 1 + childIndex.Value // Dropping at #0 should put as our index plus one.
+                    : this.arrayIndex + 1 + InputActionSerializationHelpers.GetCompositePartCount(array, this.arrayIndex);
+
+                return true;
+            }
+
+            // Drop other bindings next to us.
+            if (typeof(BindingTreeItem).IsAssignableFrom(itemType))
+            {
+                array = arrayProperty;
+                arrayIndex = this.arrayIndex + 1 +
+                    InputActionSerializationHelpers.GetCompositePartCount(array, this.arrayIndex);
+                return true;
+            }
+
+            return false;
+        }
+
+        public new static CompositeBindingTreeItem AddTo(TreeViewItem parent, SerializedProperty bindingProperty)
+        {
+            var item = new CompositeBindingTreeItem(bindingProperty);
+
+            item.depth = parent.depth + 1;
+            item.displayName = !string.IsNullOrEmpty(item.name)
+                ? item.name
+                : ObjectNames.NicifyVariableName(NameAndParameters.ParseName(item.path));
+
+            parent.AddChild(item);
+
+            return item;
+        }
+    }
+
+    /// <summary>
+    /// Tree view item for bindings that are parts of composites.
+    /// </summary>
+    /// <see cref="InputBinding.isPartOfComposite"/>
+    internal class PartOfCompositeBindingTreeItem : BindingTreeItem
+    {
+        public PartOfCompositeBindingTreeItem(SerializedProperty bindingProperty)
+            : base(bindingProperty)
+        {
+        }
+
+        public override GUIStyle colorTagStyle => Styles.pinkRect;
+        public override bool canRename => false;
+
+        public override string expectedControlLayout
+        {
+            get
+            {
+                if (m_ExpectedControlLayout == null)
+                {
+                    var partName = name;
+                    var compositeName = ((CompositeBindingTreeItem)parent).compositeName;
+                    var layoutName = InputBindingComposite.GetExpectedControlLayoutName(compositeName, partName);
+                    m_ExpectedControlLayout = layoutName ?? "";
+                }
+
+                return m_ExpectedControlLayout;
+            }
+        }
+
+        private string m_ExpectedControlLayout;
+
+        public new static PartOfCompositeBindingTreeItem AddTo(TreeViewItem parent, SerializedProperty bindingProperty)
+        {
+            var item = new PartOfCompositeBindingTreeItem(bindingProperty);
+
+            item.depth = parent.depth + 1;
+            item.displayName = $"{ObjectNames.NicifyVariableName(item.name)}: {item.displayPath}";
+            parent.AddChild(item);
+
+            return item;
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputActionTreeViewItems.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 76d591911f4ae4f62953b13f6ff50429
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputBindingPropertiesView.cs

@@ -0,0 +1,397 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using UnityEditor;
+using UnityEngine.InputSystem.Editor.Lists;
+using UnityEngine.InputSystem.Layouts;
+using UnityEngine.InputSystem.Utilities;
+
+////REVIEW: when we start with a blank tree view state, we should initialize the control picker to select the control currently
+////        selected by the path property
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// UI for editing properties of an <see cref="InputBinding"/>. Right-most pane in action editor when
+    /// binding is selected in middle pane.
+    /// </summary>
+    internal class InputBindingPropertiesView : PropertiesViewBase, IDisposable
+    {
+        public static FourCC k_GroupsChanged => new FourCC("GRPS");
+        public static FourCC k_PathChanged => new FourCC("PATH");
+        public static FourCC k_CompositeTypeChanged => new FourCC("COMP");
+        public static FourCC k_CompositePartAssignmentChanged => new FourCC("PART");
+
+        public InputBindingPropertiesView(
+            SerializedProperty bindingProperty,
+            Action<FourCC> onChange = null,
+            InputControlPickerState controlPickerState = null,
+            string expectedControlLayout = null,
+            ReadOnlyArray<InputControlScheme> controlSchemes = new ReadOnlyArray<InputControlScheme>(),
+            IEnumerable<string> controlPathsToMatch = null)
+            : base(InputActionSerializationHelpers.IsCompositeBinding(bindingProperty) ? "Composite" : "Binding",
+                   bindingProperty, onChange, expectedControlLayout)
+        {
+            m_BindingProperty = bindingProperty;
+            m_GroupsProperty = bindingProperty.FindPropertyRelative("m_Groups");
+            m_PathProperty = bindingProperty.FindPropertyRelative("m_Path");
+            m_BindingGroups = m_GroupsProperty.stringValue
+                .Split(new[] {InputBinding.Separator}, StringSplitOptions.RemoveEmptyEntries).ToList();
+            m_ExpectedControlLayout = expectedControlLayout;
+            m_ControlSchemes = controlSchemes;
+
+            var flags = (InputBinding.Flags)bindingProperty.FindPropertyRelative("m_Flags").intValue;
+            m_IsPartOfComposite = (flags & InputBinding.Flags.PartOfComposite) != 0;
+            m_IsComposite = (flags & InputBinding.Flags.Composite) != 0;
+
+            // Set up control picker for m_Path. Not needed if the binding is a composite.
+            if (!m_IsComposite)
+            {
+                m_ControlPickerState = controlPickerState ?? new InputControlPickerState();
+                m_ControlPathEditor = new InputControlPathEditor(m_PathProperty, m_ControlPickerState, OnPathChanged);
+                m_ControlPathEditor.SetExpectedControlLayout(m_ExpectedControlLayout);
+                if (controlPathsToMatch != null)
+                    m_ControlPathEditor.SetControlPathsToMatch(controlPathsToMatch);
+            }
+        }
+
+        public void Dispose()
+        {
+            m_ControlPathEditor?.Dispose();
+        }
+
+        protected override void DrawGeneralProperties()
+        {
+            var currentPath = m_PathProperty.stringValue;
+            InputSystem.OnDrawCustomWarningForBindingPath(currentPath);
+
+            if (m_IsComposite)
+            {
+                if (m_CompositeParameters == null)
+                    InitializeCompositeProperties();
+
+                // Composite type dropdown.
+                var selectedCompositeType = EditorGUILayout.Popup(s_CompositeTypeLabel, m_SelectedCompositeType, m_CompositeTypeOptions);
+                if (selectedCompositeType != m_SelectedCompositeType)
+                {
+                    m_SelectedCompositeType = selectedCompositeType;
+                    OnCompositeTypeChanged();
+                }
+
+                // Composite parameters.
+                m_CompositeParameters.OnGUI();
+            }
+            else
+            {
+                // Path.
+                m_ControlPathEditor.OnGUI();
+
+                // Composite part.
+                if (m_IsPartOfComposite)
+                {
+                    if (m_CompositeParts == null)
+                        InitializeCompositePartProperties();
+
+                    // If m_CompositeParts still null after InitializeCompositePartProperties something went wrong and we can't select
+                    if (m_CompositeParts != null)
+                    {
+                        var selectedPart = EditorGUILayout.Popup(s_CompositePartAssignmentLabel, m_SelectedCompositePart,
+                            m_CompositePartOptions);
+                        if (selectedPart != m_SelectedCompositePart)
+                        {
+                            m_SelectedCompositePart = selectedPart;
+                            OnCompositePartAssignmentChanged();
+                        }
+                    }
+                }
+
+                // Show the specific controls which match the current path
+                DrawMatchingControlPaths();
+
+                // Control scheme matrix.
+                DrawUseInControlSchemes();
+            }
+        }
+
+        /// <summary>
+        /// Used to keep track of which foldouts are expanded.
+        /// </summary>
+        private static bool showMatchingLayouts = false;
+        private static Dictionary<string, bool> showMatchingChildLayouts = new Dictionary<string, bool>();
+
+        private static void DrawMatchingControlPaths(List<MatchingControlPath> matchingControlPaths)
+        {
+            foreach (var matchingControlPath in matchingControlPaths)
+            {
+                bool showLayout = false;
+                EditorGUI.indentLevel++;
+
+                var text = $"{matchingControlPath.deviceName} > {matchingControlPath.controlName}";
+                if (matchingControlPath.children.Count() > 0 && !matchingControlPath.isRoot)
+                {
+                    showMatchingChildLayouts.TryGetValue(matchingControlPath.deviceName, out showLayout);
+                    showMatchingChildLayouts[matchingControlPath.deviceName] = EditorGUILayout.Foldout(showLayout, text);
+                }
+                else
+                {
+                    EditorGUILayout.LabelField(text);
+                }
+
+                showLayout |= matchingControlPath.isRoot;
+                if (showLayout)
+                    DrawMatchingControlPaths(matchingControlPath.children);
+
+                EditorGUI.indentLevel--;
+            }
+        }
+
+        /// <summary>
+        /// Finds all registered control paths implemented by concrete classes which match the current binding path and renders it.
+        /// </summary>
+        private void DrawMatchingControlPaths()
+        {
+            bool controlPathUsagePresent = false;
+            List<MatchingControlPath> matchingControlPaths = MatchingControlPath.CollectMatchingControlPaths(m_ControlPathEditor.pathProperty.stringValue, showMatchingLayouts, ref controlPathUsagePresent);
+            if (matchingControlPaths == null || matchingControlPaths.Count != 0)
+            {
+                EditorGUILayout.BeginVertical();
+                showMatchingLayouts = EditorGUILayout.Foldout(showMatchingLayouts, "Derived Bindings");
+
+                if (showMatchingLayouts)
+                {
+                    if (matchingControlPaths == null)
+                    {
+                        if (controlPathUsagePresent)
+                            EditorGUILayout.HelpBox("No registered controls match this current binding. Some controls are only registered at runtime.", MessageType.Warning);
+                        else
+                            EditorGUILayout.HelpBox("No other registered controls match this current binding. Some controls are only registered at runtime.", MessageType.Warning);
+                    }
+                    else
+                    {
+                        DrawMatchingControlPaths(matchingControlPaths);
+                    }
+                }
+
+                EditorGUILayout.EndVertical();
+            }
+        }
+
+        /// <summary>
+        /// Draw control scheme matrix that allows selecting which control schemes a particular
+        /// binding appears in.
+        /// </summary>
+        private void DrawUseInControlSchemes()
+        {
+            if (m_ControlSchemes.Count <= 0)
+                return;
+
+            EditorGUILayout.Space();
+            EditorGUILayout.Space();
+            EditorGUILayout.LabelField(s_UseInControlSchemesLAbel, EditorStyles.boldLabel);
+            EditorGUILayout.BeginVertical();
+
+            foreach (var scheme in m_ControlSchemes)
+            {
+                EditorGUI.BeginChangeCheck();
+                var result = EditorGUILayout.Toggle(scheme.name, m_BindingGroups.Contains(scheme.bindingGroup));
+                if (EditorGUI.EndChangeCheck())
+                {
+                    if (result)
+                    {
+                        m_BindingGroups.Add(scheme.bindingGroup);
+                    }
+                    else
+                    {
+                        m_BindingGroups.Remove(scheme.bindingGroup);
+                    }
+                    OnBindingGroupsChanged();
+                }
+            }
+
+            EditorGUILayout.EndVertical();
+        }
+
+        private void InitializeCompositeProperties()
+        {
+            // Find name of current composite.
+            var path = m_PathProperty.stringValue;
+            var compositeNameAndParameters = NameAndParameters.Parse(path);
+            var compositeName = compositeNameAndParameters.name;
+            var compositeType = InputBindingComposite.s_Composites.LookupTypeRegistration(compositeName);
+
+            // Collect all possible composite types.
+            var selectedCompositeIndex = -1;
+            var compositeTypeOptionsList = new List<GUIContent>();
+            var compositeTypeList = new List<string>();
+            var currentIndex = 0;
+            foreach (var composite in InputBindingComposite.s_Composites.internedNames.Where(x =>
+                !InputBindingComposite.s_Composites.aliases.Contains(x)).OrderBy(x => x))
+            {
+                if (!string.IsNullOrEmpty(m_ExpectedControlLayout))
+                {
+                    var valueType = InputBindingComposite.GetValueType(composite);
+                    if (valueType != null &&
+                        !InputControlLayout.s_Layouts.ValueTypeIsAssignableFrom(
+                            new InternedString(m_ExpectedControlLayout), valueType))
+                        continue;
+                }
+
+                if (InputBindingComposite.s_Composites.LookupTypeRegistration(composite) == compositeType)
+                    selectedCompositeIndex = currentIndex;
+                var name = ObjectNames.NicifyVariableName(composite);
+                compositeTypeOptionsList.Add(new GUIContent(name));
+                compositeTypeList.Add(composite);
+                ++currentIndex;
+            }
+
+            // If the current composite type isn't a registered type, add it to the list as
+            // an extra option.
+            if (selectedCompositeIndex == -1)
+            {
+                selectedCompositeIndex = compositeTypeList.Count;
+                compositeTypeOptionsList.Add(new GUIContent(ObjectNames.NicifyVariableName(compositeName)));
+                compositeTypeList.Add(compositeName);
+            }
+
+            m_CompositeTypes = compositeTypeList.ToArray();
+            m_CompositeTypeOptions = compositeTypeOptionsList.ToArray();
+            m_SelectedCompositeType = selectedCompositeIndex;
+
+            // Initialize parameters.
+            m_CompositeParameters = new ParameterListView
+            {
+                onChange = OnCompositeParametersModified
+            };
+            if (compositeType != null)
+                m_CompositeParameters.Initialize(compositeType, compositeNameAndParameters.parameters);
+        }
+
+        private void InitializeCompositePartProperties()
+        {
+            var currentCompositePart = m_BindingProperty.FindPropertyRelative("m_Name").stringValue;
+
+            ////REVIEW: this makes a lot of assumptions about the serialized data based on the one property we've been given in the ctor
+            // Determine the name of the current composite type that the part belongs to.
+            var bindingArrayProperty = m_BindingProperty.GetArrayPropertyFromElement();
+            var partBindingIndex = InputActionSerializationHelpers.GetIndex(bindingArrayProperty, m_BindingProperty);
+            var compositeBindingIndex =
+                InputActionSerializationHelpers.GetCompositeStartIndex(bindingArrayProperty, partBindingIndex);
+            if (compositeBindingIndex == -1)
+                return;
+            var compositeBindingProperty = bindingArrayProperty.GetArrayElementAtIndex(compositeBindingIndex);
+            var compositePath = compositeBindingProperty.FindPropertyRelative("m_Path").stringValue;
+            var compositeNameAndParameters = NameAndParameters.Parse(compositePath);
+
+            // Initialize option list from all parts available for the composite.
+            var optionList = new List<GUIContent>();
+            var nameList = new List<string>();
+            var currentIndex = 0;
+            var selectedPartNameIndex = -1;
+            foreach (var partName in InputBindingComposite.GetPartNames(compositeNameAndParameters.name))
+            {
+                if (partName.Equals(currentCompositePart, StringComparison.InvariantCultureIgnoreCase))
+                    selectedPartNameIndex = currentIndex;
+                var niceName = ObjectNames.NicifyVariableName(partName);
+                optionList.Add(new GUIContent(niceName));
+                nameList.Add(partName);
+                ++currentIndex;
+            }
+
+            // If currently selected part is not in list, add it as an option.
+            if (selectedPartNameIndex == -1)
+            {
+                selectedPartNameIndex = nameList.Count;
+                optionList.Add(new GUIContent(ObjectNames.NicifyVariableName(currentCompositePart)));
+                nameList.Add(currentCompositePart);
+            }
+
+            m_CompositeParts = nameList.ToArray();
+            m_CompositePartOptions = optionList.ToArray();
+            m_SelectedCompositePart = selectedPartNameIndex;
+        }
+
+        private void OnCompositeParametersModified()
+        {
+            Debug.Assert(m_CompositeParameters != null);
+
+            var path = m_PathProperty.stringValue;
+            var nameAndParameters = NameAndParameters.Parse(path);
+            nameAndParameters.parameters = m_CompositeParameters.GetParameters();
+
+            m_PathProperty.stringValue = nameAndParameters.ToString();
+            m_PathProperty.serializedObject.ApplyModifiedProperties();
+
+            OnPathChanged();
+        }
+
+        private void OnBindingGroupsChanged()
+        {
+            m_GroupsProperty.stringValue = string.Join(InputBinding.kSeparatorString, m_BindingGroups.ToArray());
+            m_GroupsProperty.serializedObject.ApplyModifiedProperties();
+
+            onChange?.Invoke(k_GroupsChanged);
+        }
+
+        private void OnPathChanged()
+        {
+            m_BindingProperty.serializedObject.ApplyModifiedProperties();
+            onChange?.Invoke(k_PathChanged);
+        }
+
+        private void OnCompositeTypeChanged()
+        {
+            var nameAndParameters = new NameAndParameters
+            {
+                name = m_CompositeTypes[m_SelectedCompositeType],
+                parameters = m_CompositeParameters.GetParameters()
+            };
+
+            InputActionSerializationHelpers.ChangeCompositeBindingType(m_BindingProperty, nameAndParameters);
+            m_PathProperty.serializedObject.ApplyModifiedProperties();
+
+            onChange?.Invoke(k_CompositeTypeChanged);
+        }
+
+        private void OnCompositePartAssignmentChanged()
+        {
+            m_BindingProperty.FindPropertyRelative("m_Name").stringValue = m_CompositeParts[m_SelectedCompositePart];
+            m_BindingProperty.serializedObject.ApplyModifiedProperties();
+
+            onChange?.Invoke(k_CompositePartAssignmentChanged);
+        }
+
+        private readonly bool m_IsComposite;
+        private ParameterListView m_CompositeParameters;
+        private int m_SelectedCompositeType;
+        private GUIContent[] m_CompositeTypeOptions;
+        private string[] m_CompositeTypes;
+
+        private int m_SelectedCompositePart;
+        private GUIContent[] m_CompositePartOptions;
+        private string[] m_CompositeParts;
+
+        private readonly SerializedProperty m_GroupsProperty;
+        private readonly SerializedProperty m_BindingProperty;
+        private readonly SerializedProperty m_PathProperty;
+
+        private readonly InputControlPickerState m_ControlPickerState;
+        private readonly InputControlPathEditor m_ControlPathEditor;
+
+        private static readonly GUIContent s_CompositeTypeLabel = EditorGUIUtility.TrTextContent("Composite Type",
+            "Type of composite. Allows changing the composite type retroactively. Doing so will modify the bindings that are part of the composite.");
+        private static readonly GUIContent s_UseInControlSchemesLAbel = EditorGUIUtility.TrTextContent("Use in control scheme",
+            "In which control schemes the binding is active. A binding can be used by arbitrary many control schemes. If a binding is not "
+            + "assigned to a specific control schemes, it is active in all of them.");
+        private static readonly GUIContent s_CompositePartAssignmentLabel = EditorGUIUtility.TrTextContent(
+            "Composite Part",
+            "The named part of the composite that the binding is assigned to. Multiple bindings may be assigned the same part. All controls from "
+            + "all bindings that are assigned the same part will collectively feed values into that part of the composite.");
+
+        private ReadOnlyArray<InputControlScheme> m_ControlSchemes;
+        private readonly List<string> m_BindingGroups;
+        private readonly string m_ExpectedControlLayout;
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/InputBindingPropertiesView.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/NameAndParameterListView.cs

@@ -0,0 +1,229 @@
+#if UNITY_EDITOR
+using System;
+using System.Linq;
+using System.Reflection;
+using UnityEditor;
+using UnityEditorInternal;
+using UnityEngine.InputSystem.Utilities;
+
+namespace UnityEngine.InputSystem.Editor.Lists
+{
+    /// <summary>
+    /// A <see cref="ReorderableList"/> to manage a set of name-and-parameter pairs and a <see cref="ParameterListView"/>
+    /// to edit the parameters of the currently selected pair.
+    /// </summary>
+    /// <remarks>
+    /// Produces output that can be consumed by <see cref="NameAndParameters.ParseMultiple"/>.
+    /// </remarks>
+    internal abstract class NameAndParameterListView
+    {
+        protected NameAndParameterListView(SerializedProperty property, Action applyAction, string expectedControlLayout, TypeTable listOptions, Func<Type, Type> getValueType, string itemName)
+        {
+            m_ItemName = itemName;
+            m_GetValueType = getValueType;
+            m_DeleteButton = EditorGUIUtility.TrIconContent("Toolbar Minus", $"Delete {itemName}");
+            m_UpButton = EditorGUIUtility.TrIconContent(GUIHelpers.LoadIcon("ChevronUp"), $"Move {itemName} up");
+            m_DownButton = EditorGUIUtility.TrIconContent(GUIHelpers.LoadIcon("ChevronDown"), $"Move {itemName} down");
+
+            m_Property = property;
+            m_Apply = applyAction;
+            m_ListOptions = listOptions;
+
+            m_ExpectedControlLayout = expectedControlLayout;
+            if (!string.IsNullOrEmpty(m_ExpectedControlLayout))
+                m_ExpectedValueType = EditorInputControlLayoutCache.GetValueType(m_ExpectedControlLayout);
+
+            m_ParametersForEachListItem = NameAndParameters.ParseMultiple(m_Property.stringValue).ToArray();
+            m_EditableParametersForEachListItem = new ParameterListView[m_ParametersForEachListItem.Length];
+
+            for (var i = 0; i < m_ParametersForEachListItem.Length; i++)
+            {
+                m_EditableParametersForEachListItem[i] = new ParameterListView { onChange = OnParametersChanged };
+                var typeName = m_ParametersForEachListItem[i].name;
+                var rowType = m_ListOptions.LookupTypeRegistration(typeName);
+                m_EditableParametersForEachListItem[i].Initialize(rowType, m_ParametersForEachListItem[i].parameters);
+
+                var name = ObjectNames.NicifyVariableName(typeName);
+
+                ////REVIEW: finding this kind of stuff should probably have better support globally on the asset; e.g. some
+                ////        notification that pops up and allows fixing all occurrences in one click
+                // Find out if we still support this option and indicate it in the list, if we don't.
+                if (rowType == null)
+                    name += " (Obsolete)";
+                else if (m_ExpectedValueType != null)
+                {
+                    var valueType = getValueType(rowType);
+                    if (valueType != null && !m_ExpectedValueType.IsAssignableFrom(valueType))
+                        name += " (Incompatible Value Type)";
+                }
+                m_EditableParametersForEachListItem[i].name = name;
+            }
+        }
+
+        public void OnAddDropdown(Rect r)
+        {
+            // Add only original names to the menu and not aliases.
+            var menu = new GenericMenu();
+            foreach (var name in m_ListOptions.internedNames.Where(x => !m_ListOptions.ShouldHideInUI(x)).OrderBy(x => x.ToString()))
+            {
+                // Skip if not compatible with value type.
+                if (m_ExpectedValueType != null)
+                {
+                    var type = m_ListOptions.LookupTypeRegistration(name);
+                    var valueType = m_GetValueType(type);
+                    if (valueType != null && !m_ExpectedValueType.IsAssignableFrom(valueType))
+                        continue;
+                }
+
+                var niceName = ObjectNames.NicifyVariableName(name);
+                menu.AddItem(new GUIContent(niceName), false, OnAddElement, name.ToString());
+            }
+            menu.ShowAsContext();
+        }
+
+        private void OnAddElement(object data)
+        {
+            var name = (string)data;
+
+            ArrayHelpers.Append(ref m_ParametersForEachListItem,
+                new NameAndParameters {name = name});
+            ArrayHelpers.Append(ref m_EditableParametersForEachListItem,
+                new ParameterListView { onChange = OnParametersChanged });
+
+            var index = m_EditableParametersForEachListItem.Length - 1;
+            var typeName = m_ParametersForEachListItem[index].name;
+            var rowType = m_ListOptions.LookupTypeRegistration(typeName);
+            m_EditableParametersForEachListItem[index].Initialize(rowType, m_ParametersForEachListItem[index].parameters);
+            m_EditableParametersForEachListItem[index].name = ObjectNames.NicifyVariableName(name);
+
+            m_Apply();
+        }
+
+        private void OnParametersChanged()
+        {
+            for (var i = 0; i < m_ParametersForEachListItem.Length; i++)
+            {
+                m_ParametersForEachListItem[i] = new NameAndParameters
+                {
+                    name = m_ParametersForEachListItem[i].name,
+                    parameters = m_EditableParametersForEachListItem[i].GetParameters(),
+                };
+            }
+
+            m_Apply();
+        }
+
+        private static class Styles
+        {
+            public static readonly GUIStyle s_FoldoutStyle = new GUIStyle("foldout").WithFontStyle(FontStyle.Bold);
+            public static readonly GUIStyle s_UpDownButtonStyle = new GUIStyle("label").WithFixedWidth(12).WithFixedHeight(12).WithPadding(new RectOffset());
+        }
+
+        private void SwapEntry(int oldIndex, int newIndex)
+        {
+            MemoryHelpers.Swap(ref m_ParametersForEachListItem[oldIndex], ref m_ParametersForEachListItem[newIndex]);
+            MemoryHelpers.Swap(ref m_EditableParametersForEachListItem[oldIndex], ref m_EditableParametersForEachListItem[newIndex]);
+            m_Apply();
+        }
+
+        public void OnGUI()
+        {
+            if (m_EditableParametersForEachListItem == null || m_EditableParametersForEachListItem.Length == 0)
+            {
+                using (new EditorGUI.DisabledScope(true))
+                {
+                    EditorGUI.indentLevel++;
+                    EditorGUILayout.LabelField($"No {m_ItemName}s have been added.");
+                    EditorGUI.indentLevel--;
+                }
+            }
+            else
+                for (var i = 0; i < m_EditableParametersForEachListItem.Length; i++)
+                {
+                    var editableParams = m_EditableParametersForEachListItem[i];
+                    EditorGUILayout.BeginHorizontal();
+                    if (editableParams.hasUIToShow)
+                        editableParams.visible = EditorGUILayout.Foldout(editableParams.visible, editableParams.name, true, Styles.s_FoldoutStyle);
+                    else
+                    {
+                        GUILayout.Space(16);
+                        EditorGUILayout.LabelField(editableParams.name, EditorStyles.boldLabel);
+                    }
+                    GUILayout.FlexibleSpace();
+                    using (new EditorGUI.DisabledScope(i == 0))
+                    {
+                        if (GUILayout.Button(m_UpButton, Styles.s_UpDownButtonStyle))
+                            SwapEntry(i, i - 1);
+                    }
+                    using (new EditorGUI.DisabledScope(i == m_EditableParametersForEachListItem.Length - 1))
+                    {
+                        if (GUILayout.Button(m_DownButton, Styles.s_UpDownButtonStyle))
+                            SwapEntry(i, i + 1);
+                    }
+                    if (GUILayout.Button(m_DeleteButton, EditorStyles.label))
+                    {
+                        // Unfocus controls, because otherwise, the editor can get confused and have text from a text field
+                        // on the deleted item leak to a different field.
+                        GUI.FocusControl(null);
+                        ArrayHelpers.EraseAt(ref m_ParametersForEachListItem, i);
+                        ArrayHelpers.EraseAt(ref m_EditableParametersForEachListItem, i);
+                        m_Apply();
+                        GUIUtility.ExitGUI();
+                    }
+                    EditorGUILayout.EndHorizontal();
+                    if (editableParams.visible)
+                    {
+                        EditorGUI.indentLevel++;
+                        editableParams.OnGUI();
+                        EditorGUI.indentLevel--;
+                    }
+                    GUIHelpers.DrawLineSeparator();
+                }
+        }
+
+        public string ToSerializableString()
+        {
+            if (m_ParametersForEachListItem == null)
+                return string.Empty;
+
+            return string.Join(NamedValue.Separator,
+                m_ParametersForEachListItem.Select(x => x.ToString()).ToArray());
+        }
+
+        private Func<Type, Type> m_GetValueType;
+        private SerializedProperty m_Property;
+        private readonly TypeTable m_ListOptions;
+        private readonly string m_ExpectedControlLayout;
+        private readonly Type m_ExpectedValueType;
+        private readonly GUIContent m_DeleteButton;
+        private readonly GUIContent m_UpButton;
+        private readonly GUIContent m_DownButton;
+        private NameAndParameters[] m_ParametersForEachListItem;
+        private ParameterListView[] m_EditableParametersForEachListItem;
+        private readonly Action m_Apply;
+        private string m_ItemName;
+    }
+
+    /// <summary>
+    /// A list of processors and their parameters.
+    /// </summary>
+    internal class ProcessorsListView : NameAndParameterListView
+    {
+        public ProcessorsListView(SerializedProperty property, Action applyAction, string expectedControlLayout)
+            : base(property, applyAction, expectedControlLayout, InputProcessor.s_Processors, InputProcessor.GetValueTypeFromType, "Processor")
+        {
+        }
+    }
+
+    /// <summary>
+    /// A list view of interactions and their parameters.
+    /// </summary>
+    internal class InteractionsListView : NameAndParameterListView
+    {
+        public InteractionsListView(SerializedProperty property, Action applyAction, string expectedControlLayout)
+            : base(property, applyAction, expectedControlLayout, InputInteraction.s_Interactions, InputInteraction.GetValueType, "Interaction")
+        {
+        }
+    }
+}
+#endif // UNITY_EDITOR

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Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/ParameterListView.cs

@@ -0,0 +1,401 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using UnityEditor;
+using UnityEngine.InputSystem.Layouts;
+using UnityEngine.InputSystem.Utilities;
+using UnityEngine.UIElements;
+
+////TODO: show description of interaction or processor when selected
+
+namespace UnityEngine.InputSystem.Editor.Lists
+{
+    /// <summary>
+    /// Inspector-like functionality for editing parameter lists as used in <see cref="InputControlLayout"/>.
+    /// </summary>
+    /// <remarks>
+    /// This can be used for parameters on interactions, processors, and composites.
+    ///
+    /// Call <see cref="Initialize"/> to set up (can be done repeatedly on the same instance). Call
+    /// <see cref="OnGUI"/> to render.
+    ///
+    /// Custom parameter GUIs can be defined by deriving from <see cref="InputParameterEditor{TObject}"/>.
+    /// This class will automatically incorporate custom GUIs and fall back to default GUIs where no custom
+    /// ones are defined.
+    /// </remarks>
+    internal class ParameterListView
+    {
+        /// <summary>
+        /// Invoked whenever a parameter is changed.
+        /// </summary>
+        public Action onChange { get; set; }
+
+        public bool hasUIToShow => (m_Parameters != null && m_Parameters.Length > 0) || m_ParameterEditor != null;
+        public bool visible { get; set; }
+        public string name { get; set; }
+
+        /// <summary>
+        /// Get the current parameter values according to the editor state.
+        /// </summary>
+        /// <returns>An array of parameter values.</returns>
+        public NamedValue[] GetParameters()
+        {
+            if (m_Parameters == null)
+                return null;
+
+            // See if we have parameters that aren't at their default value.
+            var countOfParametersNotAtDefaultValue = 0;
+            for (var i = 0; i < m_Parameters.Length; ++i)
+            {
+                if (!m_Parameters[i].isAtDefault)
+                    ++countOfParametersNotAtDefaultValue;
+            }
+
+            // If not, we return null.
+            if (countOfParametersNotAtDefaultValue == 0)
+                return null;
+
+            // Collect non-default parameter values.
+            var result = new NamedValue[countOfParametersNotAtDefaultValue];
+            var index = 0;
+            for (var i = 0; i < m_Parameters.Length; ++i)
+            {
+                var parameter = m_Parameters[i];
+                if (parameter.isAtDefault)
+                    continue;
+
+                result[index++] = parameter.value;
+            }
+
+            return result;
+        }
+
+        /// <summary>
+        /// Initialize the parameter list view based on the given registered type that has parameters to edit. This can be
+        /// things such as interactions, processors, or composites.
+        /// </summary>
+        /// <param name="registeredType">Type of object that the parameters will be passed to at runtime.
+        /// We need this to be able to determine the possible set of parameters and their possible values. This
+        /// can be a class implementing <see cref="IInputInteraction"/>, for example.</param>
+        /// <param name="existingParameters">List of existing parameters. Can be empty.</param>
+        public void Initialize(Type registeredType, ReadOnlyArray<NamedValue> existingParameters)
+        {
+            if (registeredType == null)
+            {
+                // No registered type. This usually happens when data references a registration that has
+                // been removed in the meantime (e.g. an interaction that is no longer supported). We want
+                // to accept this case and simply pretend that the given type has no parameters.
+
+                Clear();
+                return;
+            }
+
+            visible = true;
+
+            // Try to instantiate object so that we can determine defaults.
+            object instance = null;
+            try
+            {
+                instance = Activator.CreateInstance(registeredType);
+            }
+            catch (Exception)
+            {
+                // Swallow. If we can't create an instance, we simply assume no defaults.
+            }
+
+            var parameters = new List<EditableParameterValue>();
+
+            ////REVIEW: support properties here?
+            // Go through public instance fields and add every parameter found on the registered
+            // type.
+            var fields = registeredType.GetFields(BindingFlags.Public | BindingFlags.Instance);
+            foreach (var field in fields)
+            {
+                // Skip all fields that have an [InputControl] attribute. This is relevant
+                // only for composites, but we just always do it here.
+                if (field.GetCustomAttribute<InputControlAttribute>(false) != null)
+                    continue;
+
+                // Determine parameter name from field.
+                var parameter = new EditableParameterValue {field = field};
+                var name = field.Name;
+                parameter.value.name = name;
+
+                // Determine parameter type from field.
+                var fieldType = field.FieldType;
+                if (fieldType.IsEnum)
+                {
+                    // For enums, we want the underlying integer type.
+                    var underlyingType = fieldType.GetEnumUnderlyingType();
+                    var underlyingTypeCode = Type.GetTypeCode(underlyingType);
+
+                    parameter.value = parameter.value.ConvertTo(underlyingTypeCode);
+
+                    // Read enum names and values.
+                    parameter.enumNames = Enum.GetNames(fieldType);
+                    ////REVIEW: this probably falls apart if multiple members have the same value
+                    var list = new List<int>();
+                    foreach (var value in Enum.GetValues(fieldType))
+                        list.Add((int)value);
+                    parameter.enumValues = list.ToArray();
+                }
+                else
+                {
+                    var typeCode = Type.GetTypeCode(fieldType);
+                    parameter.value = parameter.value.ConvertTo(typeCode);
+                }
+
+                // Determine default value.
+                if (instance != null)
+                {
+                    try
+                    {
+                        var value = field.GetValue(instance);
+                        parameter.defaultValue = new NamedValue
+                        {
+                            name = name,
+                            value = PrimitiveValue.FromObject(value)
+                        };
+                    }
+                    catch
+                    {
+                        // If the getter throws, ignore. All we lose is the actual default value from
+                        // the field.
+                    }
+                }
+
+                // If the parameter already exists in the given list, maintain its value.
+                var existingParameterIndex = existingParameters.IndexOf(x => x.name == field.Name);
+                if (existingParameterIndex >= 0)
+                {
+                    // Make sure we're preserving the right type.
+                    parameter.value = existingParameters[existingParameterIndex].ConvertTo(parameter.value.type);
+                }
+                else
+                {
+                    // Not assigned. Set to default.
+                    if (parameter.defaultValue != null)
+                        parameter.value = parameter.defaultValue.Value;
+                }
+
+                // Add.
+                parameters.Add(parameter);
+            }
+
+            m_Parameters = parameters.ToArray();
+
+            // See if we have a dedicated parameter editor.
+            var parameterEditorType = InputParameterEditor.LookupEditorForType(registeredType);
+            if (parameterEditorType != null)
+            {
+                // Create an editor instance and hand it the instance we created. Unlike our default
+                // editing logic, on this path we will be operating on an object instance that contains
+                // the parameter values. So on this path, we actually need to update the object to reflect
+                // the current parameter values.
+
+                NamedValue.ApplyAllToObject(instance, m_Parameters.Select(x => x.value));
+
+                m_ParameterEditor = (InputParameterEditor)Activator.CreateInstance(parameterEditorType);
+
+                // We have to jump through some hoops here to create instances of any CustomOrDefaultSetting fields on the
+                // parameter editor. This is because those types changed from structs to classes when UIToolkit was
+                // introduced, and we don't want to force users to have to create those instances manually on any of their
+                // own editors.
+                var genericArgumentType = TypeHelpers.GetGenericTypeArgumentFromHierarchy(parameterEditorType,
+                    typeof(InputParameterEditor<>), 0);
+                if (genericArgumentType != null)
+                {
+                    var fieldInfos = parameterEditorType
+                        .GetFields(BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance);
+                    var customOrDefaultGenericType = typeof(InputParameterEditor<>.CustomOrDefaultSetting);
+                    var customOrDefaultType = customOrDefaultGenericType.MakeGenericType(genericArgumentType);
+                    foreach (var customOrDefaultEditorField in fieldInfos.Where(f => f.FieldType == customOrDefaultType))
+                    {
+                        customOrDefaultEditorField.SetValue(m_ParameterEditor, Activator.CreateInstance(customOrDefaultEditorField.FieldType));
+                    }
+                }
+                m_ParameterEditor.SetTarget(instance);
+            }
+            else
+            {
+                m_ParameterEditor = null;
+
+                // Create parameter labels.
+                m_ParameterLabels = new(string text, string tooltip)[m_Parameters.Length];
+                for (var i = 0; i < m_Parameters.Length; ++i)
+                {
+                    // Look up tooltip from field.
+                    var tooltip = string.Empty;
+                    var field = m_Parameters[i].field;
+                    var tooltipAttribute = field.GetCustomAttribute<TooltipAttribute>();
+                    if (tooltipAttribute != null)
+                        tooltip = tooltipAttribute.tooltip;
+
+                    // Create label.
+                    var niceName = ObjectNames.NicifyVariableName(m_Parameters[i].value.name);
+                    m_ParameterLabels[i] = (niceName, tooltip);
+                }
+            }
+        }
+
+        public void Clear()
+        {
+            m_Parameters = null;
+            m_ParameterEditor = null;
+        }
+
+        public void OnDrawVisualElements(VisualElement root)
+        {
+            if (m_ParameterEditor != null)
+            {
+                m_ParameterEditor.OnDrawVisualElements(root, OnValuesChanged);
+                return;
+            }
+
+            if (m_Parameters == null)
+                return;
+
+            void OnValueChanged(ref EditableParameterValue parameter, object result, int i)
+            {
+                parameter.value.value = PrimitiveValue.FromObject(result).ConvertTo(parameter.value.type);
+                m_Parameters[i] = parameter;
+            }
+
+            void OnEditEnd()
+            {
+                onChange?.Invoke();
+            }
+
+            for (var i = 0; i < m_Parameters.Length; i++)
+            {
+                var parameter = m_Parameters[i];
+                var label = m_ParameterLabels[i];
+                var closedIndex = i;
+
+                if (parameter.isEnum)
+                {
+                    var names = parameter.enumNames.ToList();
+                    var rawValue = parameter.value.value.ToInt32();
+                    var selectedIndex = parameter.enumValues.IndexOf(rawValue);
+                    if (selectedIndex < 0 || selectedIndex >= names.Count)
+                        selectedIndex = 0;
+
+                    var field = new DropdownField(label.text, names, selectedIndex)
+                    {
+                        tooltip = label.tooltip
+                    };
+
+                    field.RegisterValueChangedCallback(evt =>
+                    {
+                        var newBackingValue = parameter.enumValues[field.index];
+                        parameter.value.value = PrimitiveValue.FromObject(newBackingValue).ConvertTo(parameter.value.type);
+                        m_Parameters[closedIndex] = parameter;
+                        onChange?.Invoke();
+                    });
+
+                    field.RegisterCallback<BlurEvent>(_ => onChange?.Invoke());
+                    root.Add(field);
+                }
+                else if (parameter.value.type == TypeCode.Int64 || parameter.value.type == TypeCode.UInt64)
+                {
+                    var longValue = parameter.value.value.ToInt64();
+                    var field = new LongField(label.text) { value = longValue, tooltip = label.tooltip };
+                    field.RegisterValueChangedCallback(evt => OnValueChanged(ref parameter, evt.newValue, closedIndex));
+                    field.RegisterCallback<BlurEvent>(_ => OnEditEnd());
+                    root.Add(field);
+                }
+                else if (parameter.value.type.IsInt())
+                {
+                    var intValue = parameter.value.value.ToInt32();
+                    var field = new IntegerField(label.text) { value = intValue, tooltip = label.tooltip };
+                    field.RegisterValueChangedCallback(evt => OnValueChanged(ref parameter, evt.newValue, closedIndex));
+                    field.RegisterCallback<BlurEvent>(_ => OnEditEnd());
+                    root.Add(field);
+                }
+                else if (parameter.value.type == TypeCode.Single)
+                {
+                    var floatValue = parameter.value.value.ToSingle();
+                    var field = new FloatField(label.text) { value = floatValue, tooltip = label.tooltip };
+                    field.RegisterValueChangedCallback(evt => OnValueChanged(ref parameter, evt.newValue, closedIndex));
+                    field.RegisterCallback<BlurEvent>(_ => OnEditEnd());
+                    root.Add(field);
+                }
+                else if (parameter.value.type == TypeCode.Double)
+                {
+                    var floatValue = parameter.value.value.ToDouble();
+                    var field = new DoubleField(label.text) { value = floatValue, tooltip = label.tooltip };
+                    field.RegisterValueChangedCallback(evt => OnValueChanged(ref parameter, evt.newValue, closedIndex));
+                    field.RegisterCallback<BlurEvent>(_ => OnEditEnd());
+                    root.Add(field);
+                }
+                else if (parameter.value.type == TypeCode.Boolean)
+                {
+                    var boolValue = parameter.value.value.ToBoolean();
+                    var field = new Toggle(label.text) { value = boolValue, tooltip = label.tooltip };
+                    field.RegisterValueChangedCallback(evt => OnValueChanged(ref parameter, evt.newValue, closedIndex));
+                    field.RegisterValueChangedCallback(_ => OnEditEnd());
+                    root.Add(field);
+                }
+            }
+        }
+
+        private void OnValuesChanged()
+        {
+            ReadParameterValuesFrom(m_ParameterEditor.target);
+            onChange?.Invoke();
+        }
+
+        public void OnGUI()
+        {
+        }
+
+        ////REVIEW: check whether parameters have *actually* changed?
+        /// <summary>
+        /// Refresh <see cref="m_Parameters"/> from the current parameter values in <paramref name="target"/>.
+        /// </summary>
+        /// <param name="target">An instance of the current type we are editing parameters on.</param>
+        private void ReadParameterValuesFrom(object target)
+        {
+            if (m_Parameters == null)
+                return;
+
+            for (var i = 0; i < m_Parameters.Length; ++i)
+            {
+                var parameter = m_Parameters[i];
+
+                object value = null;
+                try
+                {
+                    value = parameter.field.GetValue(target);
+                }
+                catch
+                {
+                    // Ignore exceptions from getters.
+                }
+
+                m_Parameters[i].value.value = PrimitiveValue.FromObject(value).ConvertTo(parameter.value.type);
+            }
+        }
+
+        private InputParameterEditor m_ParameterEditor;
+        private EditableParameterValue[] m_Parameters;
+
+        private (string text, string tooltip)[] m_ParameterLabels;
+
+        private struct EditableParameterValue
+        {
+            public NamedValue value;
+            public NamedValue? defaultValue;
+            public int[] enumValues;
+            public string[] enumNames;
+            public FieldInfo field;
+
+            public bool isEnum => enumValues != null;
+            public bool isAtDefault => defaultValue != null && value == defaultValue.Value;
+        }
+    }
+}
+
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/ParameterListView.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/PropertiesViewBase.cs

@@ -0,0 +1,146 @@
+#if UNITY_EDITOR
+using System;
+using UnityEditor;
+using UnityEngine.InputSystem.Editor.Lists;
+using UnityEngine.InputSystem.Utilities;
+
+////TODO: show parameters for selected interaction or processor inline in list rather than separately underneath list
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Base class for views that show the properties of actions or bindings.
+    /// </summary>
+    internal abstract class PropertiesViewBase
+    {
+        protected PropertiesViewBase(string label, SerializedProperty bindingOrAction, Action<FourCC> onChange, string expectedControlLayout = null)
+        {
+            if (bindingOrAction == null)
+                throw new ArgumentNullException(nameof(bindingOrAction));
+
+            m_InteractionsProperty = bindingOrAction.FindPropertyRelative("m_Interactions");
+            m_ProcessorsProperty = bindingOrAction.FindPropertyRelative("m_Processors");
+
+            m_InteractionsList = new InteractionsListView(m_InteractionsProperty, OnInteractionsModified, expectedControlLayout);
+            UpdateProcessors(expectedControlLayout);
+
+            m_OnChange = onChange;
+            m_GeneralFoldoutLabel = EditorGUIUtility.TrTextContent(label);
+        }
+
+        protected void UpdateProcessors(string expectedControlLayout)
+        {
+            m_ProcessorsList = new ProcessorsListView(m_ProcessorsProperty, OnProcessorsModified, expectedControlLayout);
+        }
+
+        public void OnGUI()
+        {
+            EditorGUILayout.BeginVertical();
+            DrawGeneralGroup();
+            if (!m_IsPartOfComposite)
+            {
+                EditorGUILayout.Space();
+                DrawInteractionsGroup();
+            }
+            EditorGUILayout.Space();
+            DrawProcessorsGroup();
+            GUILayout.FlexibleSpace();
+            EditorGUILayout.EndVertical();
+        }
+
+        protected abstract void DrawGeneralProperties();
+
+        private void DrawGeneralGroup()
+        {
+            m_GeneralFoldout = DrawFoldout(m_GeneralFoldoutLabel, m_GeneralFoldout);
+            if (m_GeneralFoldout)
+            {
+                EditorGUI.indentLevel++;
+                DrawGeneralProperties();
+                EditorGUI.indentLevel--;
+            }
+        }
+
+        private void DrawProcessorsGroup()
+        {
+            m_ProcessorsFoldout = DrawFoldout(s_ProcessorsFoldoutLabel, m_ProcessorsFoldout, s_ProcessorsAddButton, m_ProcessorsList.OnAddDropdown);
+            if (m_ProcessorsFoldout)
+                m_ProcessorsList.OnGUI();
+        }
+
+        private void DrawInteractionsGroup()
+        {
+            m_InteractionsFoldout = DrawFoldout(s_InteractionsFoldoutLabel, m_InteractionsFoldout, s_InteractionsAddButton, m_InteractionsList.OnAddDropdown);
+            if (m_InteractionsFoldout)
+                m_InteractionsList.OnGUI();
+        }
+
+        private static bool DrawFoldout(GUIContent content, bool folded, GUIContent addButton = null, Action<Rect> addDropDown = null)
+        {
+            const int k_PopupSize = 20;
+            var bgRect = GUILayoutUtility.GetRect(content, Styles.s_FoldoutBackgroundStyle);
+            EditorGUI.LabelField(bgRect, GUIContent.none, Styles.s_FoldoutBackgroundStyle);
+            var foldoutRect = bgRect;
+            foldoutRect.xMax -= k_PopupSize;
+            var retval = EditorGUI.Foldout(foldoutRect, folded, content, true, Styles.s_FoldoutStyle);
+            if (addButton != null)
+            {
+                var popupRect = bgRect;
+                popupRect.xMin = popupRect.xMax - k_PopupSize;
+                if (GUI.Button(popupRect, addButton, EditorStyles.label))
+                    addDropDown(popupRect);
+            }
+            return retval;
+        }
+
+        private void OnProcessorsModified()
+        {
+            m_ProcessorsProperty.stringValue = m_ProcessorsList.ToSerializableString();
+            m_ProcessorsProperty.serializedObject.ApplyModifiedProperties();
+            m_OnChange(k_ProcessorsChanged);
+        }
+
+        private void OnInteractionsModified()
+        {
+            m_InteractionsProperty.stringValue = m_InteractionsList.ToSerializableString();
+            m_InteractionsProperty.serializedObject.ApplyModifiedProperties();
+            m_OnChange(k_InteractionsChanged);
+        }
+
+        public Action<FourCC> onChange => m_OnChange;
+
+        private bool m_GeneralFoldout = true;
+        private bool m_InteractionsFoldout = true;
+        private bool m_ProcessorsFoldout = true;
+        protected bool m_IsPartOfComposite;
+
+        private readonly Action<FourCC> m_OnChange;
+
+        private readonly InteractionsListView m_InteractionsList;
+        private ProcessorsListView m_ProcessorsList;
+
+        private readonly SerializedProperty m_InteractionsProperty;
+        private readonly SerializedProperty m_ProcessorsProperty;
+
+        private readonly GUIContent m_GeneralFoldoutLabel;
+
+        ////TODO: tooltips
+        private static readonly GUIContent s_ProcessorsFoldoutLabel = EditorGUIUtility.TrTextContent("Processors");
+        public static readonly GUIContent s_ProcessorsAddButton = EditorGUIUtility.TrIconContent("Toolbar Plus More", "Add Processor");
+        private static readonly GUIContent s_InteractionsFoldoutLabel = EditorGUIUtility.TrTextContent("Interactions");
+        public static readonly GUIContent s_InteractionsAddButton = EditorGUIUtility.TrIconContent("Toolbar Plus More", "Add Interaction");
+
+        public static FourCC k_InteractionsChanged => new FourCC("IACT");
+        public static FourCC k_ProcessorsChanged => new FourCC("PROC");
+
+        private static class Styles
+        {
+            public static readonly GUIStyle s_FoldoutBackgroundStyle = new GUIStyle("Label")
+                .WithNormalBackground(AssetDatabase.LoadAssetAtPath<Texture2D>(InputActionTreeView.ResourcesPath + "foldoutBackground.png"))
+                .WithBorder(new RectOffset(3, 3, 3, 3))
+                .WithMargin(new RectOffset(1, 1, 3, 3));
+            public static readonly GUIStyle s_FoldoutStyle = new GUIStyle("foldout");
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetEditor/PropertiesViewBase.cs.meta

@@ -0,0 +1,11 @@
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+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter.meta

@@ -0,0 +1,8 @@
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+guid: 9d7486ba41233414a9ed80716a544026
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/IInputActionAssetEditor.cs

@@ -0,0 +1,76 @@
+#if UNITY_EDITOR
+
+namespace UnityEngine.InputSystem.Editor
+{
+    // For clarity, the tables below indicate the callback sequences of the asset modification processor and
+    // asset post-processor for various user operations done on assets.
+    //
+    // User operation:                Callback sequence:
+    // ----------------------------------------------------------------------------------------
+    // Save                           Imported(s)
+    // Delete                         OnWillDelete(s), Deleted(s)
+    // Copy                           Imported(s)
+    // Rename                         OnWillMove(s,d), Imported(d), Moved(s,d)
+    // Move (drag) / Cut+Paste        OnWillMove(s,d), Moved(s,d)
+    // ------------------------------------------------------------------------------------------------------------
+    //
+    // User operation:                Callback/call sequence:
+    // ------------------------------------------------------------------------------------------------------------
+    // Save                           Imported(s)
+    // Delete                         OnWillDelete(s), Deleted(s)
+    // Copy                           Imported(s), Fix(s), Imported(s)
+    // Rename                         OnWillMove(s,d), Imported(d), Fix(d), Moved(s,d), Imported(d)
+    // Move(drag) / Cut+Paste         OnWillMove(s,d), Moved(s,d)
+    // ------------------------------------------------------------------------------------------------------------
+    // Note that as stated in table above, JSON name changes (called "Fix" above) will only be executed when either
+    // Copying, Renaming within the editor. For all other operations the name and file name would not differ.
+    //
+    // External user operation:       Callback/call sequence:
+    // ------------------------------------------------------------------------------------------------------------
+    // Save                           Imported(s)
+    // Delete                         Deleted(s)
+    // Copy                           Imported(s)
+    // Rename                         Imported(d), Deleted(s)
+    // Move(drag) / Cut+Paste         Imported(d), Deleted(s)
+    // ------------------------------------------------------------------------------------------------------------
+
+    /// <summary>
+    /// Callback interface for monitoring changes to assets.
+    /// </summary>
+    internal interface IAssetObserver
+    {
+        /// <summary>
+        /// Callback triggered when the associated asset is imported.
+        /// </summary>
+        void OnAssetImported();
+
+        /// <summary>
+        /// Callback triggered when the associated asset is moved.
+        /// </summary>
+        void OnAssetMoved();
+
+        /// <summary>
+        /// Callback triggered when the associated asset is deleted.
+        /// </summary>
+        void OnAssetDeleted();
+    }
+
+    /// <summary>
+    /// Interface representing an editor capable of editing <c>InputActionAsset</c> instances associated
+    /// with an asset file in the Asset Database (ADB).
+    /// </summary>
+    internal interface IInputActionAssetEditor : IAssetObserver
+    {
+        /// <summary>
+        /// A read-only string representation of the asset GUID associated with the asset being edited.
+        /// </summary>
+        string assetGUID { get; }
+
+        /// <summary>
+        /// Returns whether the editor has unsaved changes compared to the associated imported source asset.
+        /// </summary>
+        bool isDirty { get; }
+    }
+}
+
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/IInputActionAssetEditor.cs.meta

@@ -0,0 +1,11 @@
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+guid: 2603947746e342918fcad117e9ce6db6
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionAssetEditor.cs

@@ -0,0 +1,262 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using UnityEditor;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    // We want an empty editor in the inspector. Editing happens in a dedicated window.
+    [CustomEditor(typeof(InputActionAsset))]
+    internal class InputActionAssetEditor : UnityEditor.Editor
+    {
+        protected override void OnHeaderGUI()
+        {
+        }
+
+        public override void OnInspectorGUI()
+        {
+        }
+
+        #region Support abstract editor registration
+
+        private static readonly List<Type> s_EditorTypes = new List<Type>();
+
+        // Registers an asset editor type for receiving asset modification callbacks.
+        public static void RegisterType<T>() where T : IInputActionAssetEditor
+        {
+            if (!s_EditorTypes.Contains(typeof(T)))
+                s_EditorTypes.Add(typeof(T));
+        }
+
+        // Unregisters an asset editor type from receiving asset modification callbacks.
+        public static void UnregisterType<T>() where T : IInputActionAssetEditor
+        {
+            s_EditorTypes.Remove(typeof(T));
+        }
+
+        public static T FindOpenEditor<T>(string path) where T : EditorWindow
+        {
+            var openEditors = FindAllEditorsForPath(path);
+            foreach (var openEditor in openEditors)
+            {
+                if (openEditor.GetType() == typeof(T))
+                    return (T)openEditor;
+            }
+            return null;
+        }
+
+        // Finds all asset editors associated with the asset given by path.
+        public static IInputActionAssetEditor[] FindAllEditorsForPath(string path)
+        {
+            var guid = AssetDatabase.AssetPathToGUID(path);
+            return guid != null ? FindAllEditors((editor) => editor.assetGUID == guid) :
+                Array.Empty<IInputActionAssetEditor>();
+        }
+
+        // Finds all asset editors fulfilling the given predicate.
+        public static IInputActionAssetEditor[] FindAllEditors(Predicate<IInputActionAssetEditor> predicate = null)
+        {
+            List<IInputActionAssetEditor> editors = null;
+            foreach (var type in s_EditorTypes)
+                editors = FindAllEditors(type, predicate, editors);
+            return editors != null ? editors.ToArray() : Array.Empty<IInputActionAssetEditor>();
+        }
+
+        private static List<IInputActionAssetEditor> FindAllEditors(Type type,
+            Predicate<IInputActionAssetEditor> predicate = null,
+            List<IInputActionAssetEditor> result = null)
+        {
+            if (result == null)
+                result = new List<IInputActionAssetEditor>();
+            var editors = Resources.FindObjectsOfTypeAll(type);
+            foreach (var editor in editors)
+            {
+                if (editor is IInputActionAssetEditor actionsAssetEditor && (predicate == null || predicate(actionsAssetEditor)))
+                    result.Add(actionsAssetEditor);
+            }
+            return result;
+        }
+
+        #endregion
+
+        #region Asset modification processor to intercept Unity editor move or delete operations
+        // Asset modification processor designed to handle the following scenarios:
+        // - When an asset is about to get deleted, evaluate if there is a pending unsaved edited copy of the asset
+        //   open in any associated editor and in this case, prompt the user that there are unsaved changes and allow
+        //   the user to cancel the operation and allow to save the pending changes or confirm to delete the asset and
+        //   discard the pending unsaved changes (via OnAssetDeleted() notification).
+        // - If the asset being deleted is not open in any editors or any open copies are not modified, no dialog
+        //   prompt is displayed and the asset is deleted.
+        // - When an asset is about to get moved, notify any editors having the asset open about the move.
+        //
+        // See comments further down in this class for expected callback sequences.
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses", Justification = "Intantiated through reflection by Unity")]
+        private class InputActionAssetModificationProcessor : UnityEditor.AssetModificationProcessor
+        {
+            public static AssetDeleteResult OnWillDeleteAsset(string path, RemoveAssetOptions options)
+            {
+                if (InputActionImporter.IsInputActionAssetPath(path))
+                {
+                    // Find any open editors associated to the asset and if any of them holds unsaved changes
+                    // allow the user to discard unsaved changes or cancel deletion.
+                    var editorWithAssetOpen = InputActionAssetEditor.FindAllEditorsForPath(path);
+                    foreach (var editor in editorWithAssetOpen)
+                    {
+                        if (editor.isDirty)
+                        {
+                            var result = Dialog.InputActionAsset.ShowDiscardUnsavedChanges(path);
+                            if (result == Dialog.Result.Cancel)
+                                return AssetDeleteResult.FailedDelete;
+                            break;
+                        }
+                    }
+
+                    // Notify all associated editors that asset will be deleted
+                    foreach (var editor in editorWithAssetOpen)
+                        editor.OnAssetDeleted();
+                }
+
+                return default;
+            }
+
+            public static AssetMoveResult OnWillMoveAsset(string sourcePath, string destinationPath)
+            {
+                if (InputActionImporter.IsInputActionAssetPath(sourcePath))
+                {
+                    var editorWithAssetOpen = InputActionAssetEditor.FindAllEditorsForPath(sourcePath);
+                    foreach (var editor in editorWithAssetOpen)
+                        editor.OnAssetMoved();
+                }
+
+                return default;
+            }
+        }
+
+        #endregion
+
+        #region Asset post processor to react to internal or external asset import, move, delete events.
+        // Processor detecting any Unity editor internal or external (file system) changes to an asset and notifies
+        // any associated asset editors about those changes via callbacks.
+        //
+        // Note that any editor classes interested in receiving notifications need to be registered.
+        //
+        // For clarity, the tables below indicate the callback sequences of the asset modification processor and
+        // asset post-processor for various user operations done on assets.
+        //
+        // s = source file
+        // d = destination file
+        // * = operation may be aborted by user
+        //
+        // User operation:                Callback sequence:
+        // ----------------------------------------------------------------------------------------
+        // Write (Save)                   Imported(s)
+        // Delete                         OnWillDelete(s), Deleted(s)*
+        // Copy                           Imported(s)
+        // Rename                         OnWillMove(s,d), Imported(d), Moved(s,d)
+        // Move (drag) / Cut+Paste        OnWillMove(s,d), Moved(s,d)
+        // ------------------------------------------------------------------------------------------------------------
+        //
+        // External user operation:       Callback/call sequence:
+        // ------------------------------------------------------------------------------------------------------------
+        // Save                           Imported(s)
+        // Delete                         Deleted(s)
+        // Copy                           Imported(s)
+        // Rename                         Imported(d), Deleted(s)
+        // Move(drag) / Cut+Paste         Imported(d), Deleted(s)
+        // ------------------------------------------------------------------------------------------------------------
+        [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1812:AvoidUninstantiatedInternalClasses", Justification = "Intantiated through reflection by Unity")]
+        private class InputActionAssetPostprocessor : AssetPostprocessor
+        {
+            private static bool s_DoNotifyEditorsScheduled;
+            private static List<string> s_Imported = new List<string>();
+            private static List<string> s_Deleted = new List<string>();
+            private static List<string> s_Moved = new List<string>();
+
+            private static void Notify(IReadOnlyCollection<string> assets,
+                IReadOnlyCollection<IInputActionAssetEditor> editors, Action<IInputActionAssetEditor> callback)
+            {
+                foreach (var asset in assets)
+                {
+                    var assetGuid = AssetDatabase.AssetPathToGUID(asset);
+                    foreach (var editor in editors)
+                    {
+                        if (editor.assetGUID != assetGuid)
+                            continue;
+
+                        try
+                        {
+                            callback(editor);
+                        }
+                        catch (Exception e)
+                        {
+                            Debug.LogException(e);
+                        }
+                    }
+                }
+            }
+
+            private static void NotifyEditors()
+            {
+                try
+                {
+                    // When the asset is modified outside of the editor and the importer settings are
+                    // visible in the Inspector the asset references in the importer inspector need to be
+                    // force rebuild (otherwise we gets lots of exceptions).
+                    ActiveEditorTracker.sharedTracker.ForceRebuild();
+
+                    // Unconditionally find all existing editors regardless of associated asset
+                    var editors = InputActionAssetEditor.FindAllEditors();
+
+                    // Abort if there are no available candidate editors
+                    if (editors == null || editors.Length == 0)
+                        return;
+
+                    // Notify editors about asset changes
+                    Notify(s_Imported, editors, (editor) => editor.OnAssetImported());
+                    Notify(s_Deleted, editors, (editor) => editor.OnAssetDeleted());
+                    Notify(s_Moved, editors, (editor) => editor.OnAssetMoved());
+                }
+                finally
+                {
+                    s_Imported.Clear();
+                    s_Deleted.Clear();
+                    s_Moved.Clear();
+
+                    s_DoNotifyEditorsScheduled = false;
+                }
+            }
+
+            private static void Process(string[] assets, ICollection<string> target)
+            {
+                foreach (var asset in assets)
+                {
+                    // Ignore any assets with non matching extensions
+                    if (!InputActionImporter.IsInputActionAssetPath(asset))
+                        continue;
+
+                    // Register asset in target collection for delay invocation
+                    target.Add(asset);
+
+                    // If a notification execution has already been scheduled do nothing apart from registration.
+                    // We do this with delayed execution to avoid excessive updates interfering with ADB.
+                    if (!s_DoNotifyEditorsScheduled)
+                    {
+                        EditorApplication.delayCall += NotifyEditors;
+                        s_DoNotifyEditorsScheduled = true;
+                    }
+                }
+            }
+
+            private static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets,
+                string[] movedAssets, string[] movedFromAssetPaths, bool didDomainReload)
+            {
+                Process(importedAssets, s_Imported);
+                Process(deletedAssets, s_Deleted);
+                Process(movedAssets, s_Moved);
+            }
+        }
+
+        #endregion
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionAssetEditor.cs.meta

@@ -0,0 +1,11 @@
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+  externalObjects: {}
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+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionAssetIconLoader.cs

@@ -0,0 +1,38 @@
+#if UNITY_EDITOR
+using UnityEditor;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    // Note that non-existing caching here is intentional since icon selected might be theme dependent.
+    // There is no reason to cache icons unless there is a significant performance impact on the editor.
+
+    /// <summary>
+    /// Provides access to icons associated with <see cref="InputActionAsset"/> and <see cref="InputActionReference"/>.
+    /// </summary>
+    internal static class InputActionAssetIconLoader
+    {
+        private const string kActionIcon = "Packages/com.unity.inputsystem/InputSystem/Editor/Icons/InputAction.png";
+        private const string kAssetIcon = "Packages/com.unity.inputsystem/InputSystem/Editor/Icons/InputActionAsset.png";
+
+        /// <summary>
+        /// Attempts to load the icon associated with an <see cref="InputActionAsset"/>.
+        /// </summary>
+        /// <returns>Icon resource reference or <code>null</code> if the resource could not be loaded.</returns>
+        internal static Texture2D LoadAssetIcon()
+        {
+            return (Texture2D)EditorGUIUtility.Load(kAssetIcon);
+        }
+
+        /// <summary>
+        /// Attempts to load the icon associated with an <see cref="InputActionReference"/> sub-asset of an
+        /// <see cref="InputActionAsset"/>.
+        /// </summary>
+        /// <returns>Icon resource reference or <code>null</code> if the resource could not be loaded.</returns>
+        internal static Texture2D LoadActionIcon()
+        {
+            return (Texture2D)EditorGUIUtility.Load(kActionIcon);
+        }
+    }
+}
+
+#endif // #if UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionAssetIconLoader.cs.meta

@@ -0,0 +1,11 @@
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+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionCodeGenerator.cs

@@ -0,0 +1,599 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections;
+using System.IO;
+using System.Linq;
+using System.Text;
+using UnityEngine.InputSystem.Utilities;
+using UnityEditor;
+
+////TODO: option to allow referencing the original asset rather than embedding it
+
+////TODO: emit indexer directly at toplevel so you can more easily look up actions dynamically
+
+////TODO: put the generated code behind #if that depends on input system
+
+////TODO: suffix map properties with Map or Actions (e.g. "PlayerMap" instead of "Player")
+
+////TODO: unify the generated events so that performed, canceled, and started all go into a single event
+
+////TODO: look up actions and maps by ID rather than by name
+
+////TODO: only generate @something if @ is really needed
+
+////TODO: allow having an unnamed or default-named action set which spills actions directly into the toplevel wrapper
+
+////TODO: add cleanup for ActionEvents
+
+////TODO: protect generated wrapper against modifications made to asset
+
+////TODO: make capitalization consistent in the generated code
+
+////TODO: instead of loading from JSON, generate the structure in code
+
+////REVIEW: allow putting *all* of the data from the inputactions asset into the generated class?
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Utility to generate code that makes it easier to work with action sets.
+    /// </summary>
+    public static class InputActionCodeGenerator
+    {
+        private const int kSpacesPerIndentLevel = 4;
+
+        private const string kClassExample = @"using namespace UnityEngine;
+using UnityEngine.InputSystem;
+
+// Example of using an InputActionMap named ""Player"" from a UnityEngine.MonoBehaviour implementing callback interface.
+public class Example : MonoBehaviour, MyActions.IPlayerActions
+{
+    private MyActions_Actions m_Actions;                  // Source code representation of asset.
+    private MyActions_Actions.PlayerActions m_Player;     // Source code representation of action map.
+
+    void Awake()
+    {
+        m_Actions = new MyActions_Actions();              // Create asset object.
+        m_Player = m_Actions.Player;                      // Extract action map object.
+        m_Player.AddCallbacks(this);                      // Register callback interface IPlayerActions.
+    }
+
+    void OnDestroy()
+    {
+        m_Actions.Dispose();                              // Destroy asset object.
+    }
+
+    void OnEnable()
+    {
+        m_Player.Enable();                                // Enable all actions within map.
+    }
+
+    void OnDisable()
+    {
+        m_Player.Disable();                               // Disable all actions within map.
+    }
+
+    #region Interface implementation of MyActions.IPlayerActions
+
+    // Invoked when ""Move"" action is either started, performed or canceled.
+    public void OnMove(InputAction.CallbackContext context)
+    {
+        Debug.Log($""OnMove: {context.ReadValue<Vector2>()}"");
+    }
+
+    // Invoked when ""Attack"" action is either started, performed or canceled.
+    public void OnAttack(InputAction.CallbackContext context)
+    {
+        Debug.Log($""OnAttack: {context.ReadValue<float>()}"");
+    }
+
+    #endregion
+}";
+
+        public struct Options
+        {
+            public string className { get; set; }
+            public string namespaceName { get; set; }
+            public string sourceAssetPath { get; set; }
+        }
+
+        public static string GenerateWrapperCode(InputActionAsset asset, Options options = default)
+        {
+            if (asset == null)
+                throw new ArgumentNullException(nameof(asset));
+
+            if (string.IsNullOrEmpty(options.sourceAssetPath))
+                options.sourceAssetPath = AssetDatabase.GetAssetPath(asset);
+            if (string.IsNullOrEmpty(options.className) && !string.IsNullOrEmpty(asset.name))
+                options.className =
+                    CSharpCodeHelpers.MakeTypeName(asset.name);
+
+            if (string.IsNullOrEmpty(options.className))
+            {
+                if (string.IsNullOrEmpty(options.sourceAssetPath))
+                    throw new ArgumentException("options.sourceAssetPath");
+                options.className =
+                    CSharpCodeHelpers.MakeTypeName(Path.GetFileNameWithoutExtension(options.sourceAssetPath));
+            }
+
+            var writer = new Writer
+            {
+                buffer = new StringBuilder()
+            };
+
+            // Header.
+            writer.WriteLine(CSharpCodeHelpers.MakeAutoGeneratedCodeHeader("com.unity.inputsystem:InputActionCodeGenerator",
+                InputSystem.version.ToString(),
+                options.sourceAssetPath));
+
+            // Usings.
+            writer.WriteLine("using System;");
+            writer.WriteLine("using System.Collections;");
+            writer.WriteLine("using System.Collections.Generic;");
+            writer.WriteLine("using UnityEngine.InputSystem;");
+            writer.WriteLine("using UnityEngine.InputSystem.Utilities;");
+            writer.WriteLine("");
+
+            // Begin namespace.
+            var haveNamespace = !string.IsNullOrEmpty(options.namespaceName);
+            if (haveNamespace)
+            {
+                writer.WriteLine($"namespace {options.namespaceName}");
+                writer.BeginBlock();
+            }
+
+            // Begin class.
+            writer.DocSummary($"Provides programmatic access to <see cref=\"InputActionAsset\" />, " +
+                "<see cref=\"InputActionMap\" />, <see cref=\"InputAction\" /> and " +
+                "<see cref=\"InputControlScheme\" /> instances defined " +
+                $"in asset \"{options.sourceAssetPath}\".");
+            writer.DocRemarks("This class is source generated and any manual edits will be discarded if the associated asset is reimported or modified.");
+            writer.DocExample(kClassExample);
+
+            writer.WriteLine($"public partial class @{options.className}: IInputActionCollection2, IDisposable");
+            writer.BeginBlock();
+
+            writer.DocSummary("Provides access to the underlying asset instance.");
+            writer.WriteLine($"public InputActionAsset asset {{ get; }}");
+            writer.WriteLine();
+
+            // Default constructor.
+            writer.DocSummary("Constructs a new instance.");
+            writer.WriteLine($"public @{options.className}()");
+            writer.BeginBlock();
+            writer.WriteLine($"asset = InputActionAsset.FromJson(@\"{asset.ToJson().Replace("\"", "\"\"")}\");");
+
+            var maps = asset.actionMaps;
+            var schemes = asset.controlSchemes;
+            foreach (var map in maps)
+            {
+                var mapName = CSharpCodeHelpers.MakeIdentifier(map.name);
+                writer.WriteLine($"// {map.name}");
+                writer.WriteLine($"m_{mapName} = asset.FindActionMap(\"{map.name}\", throwIfNotFound: true);");
+
+                foreach (var action in map.actions)
+                {
+                    var actionName = CSharpCodeHelpers.MakeIdentifier(action.name);
+                    writer.WriteLine($"m_{mapName}_{actionName} = m_{mapName}.FindAction(\"{action.name}\", throwIfNotFound: true);");
+                }
+            }
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.WriteLine($"~@{options.className}()");
+            writer.BeginBlock();
+            foreach (var map in maps)
+            {
+                var mapName = CSharpCodeHelpers.MakeIdentifier(map.name);
+                writer.WriteLine($"UnityEngine.Debug.Assert(!m_{mapName}.enabled, \"This will cause a leak and performance issues, {options.className}.{mapName}.Disable() has not been called.\");");
+            }
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocSummary("Destroys this asset and all associated <see cref=\"InputAction\"/> instances.");
+            writer.WriteLine("public void Dispose()");
+            writer.BeginBlock();
+            writer.WriteLine("UnityEngine.Object.Destroy(asset);");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            var classNamePrefix = typeof(InputActionAsset).Namespace + "." + nameof(InputActionAsset) + ".";
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.bindingMask));
+            writer.WriteLine("public InputBinding? bindingMask");
+            writer.BeginBlock();
+            writer.WriteLine("get => asset.bindingMask;");
+            writer.WriteLine("set => asset.bindingMask = value;");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.devices));
+            writer.WriteLine("public ReadOnlyArray<InputDevice>? devices");
+            writer.BeginBlock();
+            writer.WriteLine("get => asset.devices;");
+            writer.WriteLine("set => asset.devices = value;");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.controlSchemes));
+            writer.WriteLine("public ReadOnlyArray<InputControlScheme> controlSchemes => asset.controlSchemes;");
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.Contains) + "(InputAction)");
+            writer.WriteLine("public bool Contains(InputAction action)");
+            writer.BeginBlock();
+            writer.WriteLine("return asset.Contains(action);");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.GetEnumerator) + "()");
+            writer.WriteLine("public IEnumerator<InputAction> GetEnumerator()");
+            writer.BeginBlock();
+            writer.WriteLine("return asset.GetEnumerator();");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocInherit(nameof(IEnumerable) + "." + nameof(IEnumerable.GetEnumerator) + "()");
+            writer.WriteLine("IEnumerator IEnumerable.GetEnumerator()");
+            writer.BeginBlock();
+            writer.WriteLine("return GetEnumerator();");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.Enable) + "()");
+            writer.WriteLine("public void Enable()");
+            writer.BeginBlock();
+            writer.WriteLine("asset.Enable();");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.Disable) + "()");
+            writer.WriteLine("public void Disable()");
+            writer.BeginBlock();
+            writer.WriteLine("asset.Disable();");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.bindings));
+            writer.WriteLine("public IEnumerable<InputBinding> bindings => asset.bindings;");
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.FindAction) + "(string, bool)");
+            writer.WriteLine("public InputAction FindAction(string actionNameOrId, bool throwIfNotFound = false)");
+            writer.BeginBlock();
+            writer.WriteLine("return asset.FindAction(actionNameOrId, throwIfNotFound);");
+            writer.EndBlock();
+            writer.WriteLine();
+
+            writer.DocInherit(classNamePrefix + nameof(InputActionAsset.FindBinding) + "(InputBinding, out InputAction)");
+            writer.WriteLine("public int FindBinding(InputBinding bindingMask, out InputAction action)");
+            writer.BeginBlock();
+            writer.WriteLine("return asset.FindBinding(bindingMask, out action);");
+            writer.EndBlock();
+
+            // Action map accessors.
+            var inputActionMapClassPrefix = typeof(InputActionMap).Namespace + "." + nameof(InputActionMap) + ".";
+            foreach (var map in maps)
+            {
+                writer.WriteLine();
+                writer.WriteLine($"// {map.name}");
+
+                var mapName = CSharpCodeHelpers.MakeIdentifier(map.name);
+                var mapTypeName = CSharpCodeHelpers.MakeTypeName(mapName, "Actions");
+
+                // Caching field for action map.
+                writer.WriteLine($"private readonly InputActionMap m_{mapName};");
+                writer.WriteLine(string.Format("private List<I{0}> m_{0}CallbackInterfaces = new List<I{0}>();", mapTypeName));
+
+                // Caching fields for all actions.
+                foreach (var action in map.actions)
+                {
+                    var actionName = CSharpCodeHelpers.MakeIdentifier(action.name);
+                    writer.WriteLine($"private readonly InputAction m_{mapName}_{actionName};");
+                }
+
+                // Struct wrapping access to action set.
+                writer.DocSummary($"Provides access to input actions defined in input action map \"{map.name}\".");
+                writer.WriteLine($"public struct {mapTypeName}");
+                writer.BeginBlock();
+
+                writer.WriteLine($"private @{options.className} m_Wrapper;");
+                writer.WriteLine();
+
+                // Constructor.
+                writer.DocSummary("Construct a new instance of the input action map wrapper class.");
+                writer.WriteLine($"public {mapTypeName}(@{options.className} wrapper) {{ m_Wrapper = wrapper; }}");
+
+                // Getter for each action.
+                foreach (var action in map.actions)
+                {
+                    var actionName = CSharpCodeHelpers.MakeIdentifier(action.name);
+                    writer.DocSummary($"Provides access to the underlying input action \"{mapName}/{actionName}\".");
+                    writer.WriteLine(
+                        $"public InputAction @{actionName} => m_Wrapper.m_{mapName}_{actionName};");
+                }
+
+                // Action map getter.
+                writer.DocSummary("Provides access to the underlying input action map instance.");
+                writer.WriteLine($"public InputActionMap Get() {{ return m_Wrapper.m_{mapName}; }}");
+
+                // Enable/disable methods.
+                writer.DocInherit(inputActionMapClassPrefix + nameof(InputActionMap.Enable) + "()");
+                writer.WriteLine("public void Enable() { Get().Enable(); }");
+                writer.DocInherit(inputActionMapClassPrefix + nameof(InputActionMap.Disable) + "()");
+                writer.WriteLine("public void Disable() { Get().Disable(); }");
+                writer.DocInherit(inputActionMapClassPrefix + nameof(InputActionMap.enabled));
+                writer.WriteLine("public bool enabled => Get().enabled;");
+
+                // Implicit conversion operator.
+                writer.DocSummary($"Implicitly converts an <see ref=\"{mapTypeName}\" /> to an <see ref=\"InputActionMap\" /> instance.");
+                writer.WriteLine(
+                    $"public static implicit operator InputActionMap({mapTypeName} set) {{ return set.Get(); }}");
+
+                // AddCallbacks method.
+                writer.DocSummary("Adds <see cref=\"InputAction.started\"/>, <see cref=\"InputAction.performed\"/> and <see cref=\"InputAction.canceled\"/> callbacks provided via <param cref=\"instance\" /> on all input actions contained in this map.");
+                writer.DocParam("instance", "Callback instance.");
+                writer.DocRemarks("If <paramref name=\"instance\" /> is <c>null</c> or <paramref name=\"instance\"/> have already been added this method does nothing.");
+                writer.DocSeeAlso(mapTypeName);
+                writer.WriteLine($"public void AddCallbacks(I{mapTypeName} instance)");
+                writer.BeginBlock();
+
+                // Initialize new interface.
+                writer.WriteLine($"if (instance == null || m_Wrapper.m_{mapTypeName}CallbackInterfaces.Contains(instance)) return;");
+                writer.WriteLine($"m_Wrapper.m_{mapTypeName}CallbackInterfaces.Add(instance);");
+
+                foreach (var action in map.actions)
+                {
+                    var actionName = CSharpCodeHelpers.MakeIdentifier(action.name);
+                    var actionTypeName = CSharpCodeHelpers.MakeTypeName(action.name);
+
+                    writer.WriteLine($"@{actionName}.started += instance.On{actionTypeName};");
+                    writer.WriteLine($"@{actionName}.performed += instance.On{actionTypeName};");
+                    writer.WriteLine($"@{actionName}.canceled += instance.On{actionTypeName};");
+                }
+
+                writer.EndBlock();
+                writer.WriteLine();
+
+                // UnregisterCallbacks method.
+                writer.DocSummary("Removes <see cref=\"InputAction.started\"/>, <see cref=\"InputAction.performed\"/> and <see cref=\"InputAction.canceled\"/> callbacks provided via <param cref=\"instance\" /> on all input actions contained in this map.");
+                writer.DocRemarks("Calling this method when <paramref name=\"instance\" /> have not previously been registered has no side-effects.");
+                writer.DocSeeAlso(mapTypeName);
+                writer.WriteLine($"private void UnregisterCallbacks(I{mapTypeName} instance)");
+                writer.BeginBlock();
+                foreach (var action in map.actions)
+                {
+                    var actionName = CSharpCodeHelpers.MakeIdentifier(action.name);
+                    var actionTypeName = CSharpCodeHelpers.MakeTypeName(action.name);
+
+                    writer.WriteLine($"@{actionName}.started -= instance.On{actionTypeName};");
+                    writer.WriteLine($"@{actionName}.performed -= instance.On{actionTypeName};");
+                    writer.WriteLine($"@{actionName}.canceled -= instance.On{actionTypeName};");
+                }
+                writer.EndBlock();
+                writer.WriteLine();
+
+                // RemoveCallbacks method.
+                writer.DocSummary($"Unregisters <param cref=\"instance\" /> and unregisters all input action callbacks via <see cref=\"{mapTypeName}.UnregisterCallbacks(I{mapTypeName})\" />.");
+                writer.DocSeeAlso($"{mapTypeName}.UnregisterCallbacks(I{mapTypeName})");
+                writer.WriteLine($"public void RemoveCallbacks(I{mapTypeName} instance)");
+                writer.BeginBlock();
+                writer.WriteLine($"if (m_Wrapper.m_{mapTypeName}CallbackInterfaces.Remove(instance))");
+                writer.WriteLine($"    UnregisterCallbacks(instance);");
+                writer.EndBlock();
+                writer.WriteLine();
+
+                // SetCallbacks method.
+                writer.DocSummary($"Replaces all existing callback instances and previously registered input action callbacks associated with them with callbacks provided via <param cref=\"instance\" />.");
+                writer.DocRemarks($"If <paramref name=\"instance\" /> is <c>null</c>, calling this method will only unregister all existing callbacks but not register any new callbacks.");
+                writer.DocSeeAlso($"{mapTypeName}.AddCallbacks(I{mapTypeName})");
+                writer.DocSeeAlso($"{mapTypeName}.RemoveCallbacks(I{mapTypeName})");
+                writer.DocSeeAlso($"{mapTypeName}.UnregisterCallbacks(I{mapTypeName})");
+                writer.WriteLine($"public void SetCallbacks(I{mapTypeName} instance)");
+                writer.BeginBlock();
+                ////REVIEW: this would benefit from having a single callback on InputActions rather than three different endpoints
+
+                writer.WriteLine($"foreach (var item in m_Wrapper.m_{mapTypeName}CallbackInterfaces)");
+                writer.WriteLine($"    UnregisterCallbacks(item);");
+                writer.WriteLine($"m_Wrapper.m_{mapTypeName}CallbackInterfaces.Clear();");
+
+                // Initialize new interface.
+                writer.WriteLine("AddCallbacks(instance);");
+                writer.EndBlock();
+                writer.EndBlock();
+
+                // Getter for instance of struct.
+                writer.DocSummary($"Provides a new <see cref=\"{mapTypeName}\" /> instance referencing this action map.");
+                writer.WriteLine($"public {mapTypeName} @{mapName} => new {mapTypeName}(this);");
+            }
+
+            // Control scheme accessors.
+            foreach (var scheme in schemes)
+            {
+                var identifier = CSharpCodeHelpers.MakeIdentifier(scheme.name);
+
+                writer.WriteLine($"private int m_{identifier}SchemeIndex = -1;");
+                writer.DocSummary("Provides access to the input control scheme.");
+                writer.DocSeeAlso(typeof(InputControlScheme).Namespace + "." + nameof(InputControlScheme));
+                writer.WriteLine($"public InputControlScheme {identifier}Scheme");
+                writer.BeginBlock();
+                writer.WriteLine("get");
+                writer.BeginBlock();
+                writer.WriteLine($"if (m_{identifier}SchemeIndex == -1) m_{identifier}SchemeIndex = asset.FindControlSchemeIndex(\"{scheme.name}\");");
+                writer.WriteLine($"return asset.controlSchemes[m_{identifier}SchemeIndex];");
+                writer.EndBlock();
+                writer.EndBlock();
+            }
+
+            // Generate interfaces.
+            var inputActionClassReference = typeof(InputAction).Namespace + "." + nameof(InputAction) + ".";
+            foreach (var map in maps)
+            {
+                var typeName = CSharpCodeHelpers.MakeTypeName(map.name);
+                writer.DocSummary($"Interface to implement callback methods for all input action callbacks associated with input actions defined by \"{map.name}\" which allows adding and removing callbacks.");
+                writer.DocSeeAlso($"{typeName}Actions.AddCallbacks(I{typeName}Actions)");
+                writer.DocSeeAlso($"{typeName}Actions.RemoveCallbacks(I{typeName}Actions)");
+                writer.WriteLine($"public interface I{typeName}Actions");
+                writer.BeginBlock();
+
+                foreach (var action in map.actions)
+                {
+                    var methodName = CSharpCodeHelpers.MakeTypeName(action.name);
+                    writer.DocSummary($"Method invoked when associated input action \"{action.name}\" is either <see cref=\"UnityEngine.InputSystem.InputAction.started\" />, <see cref=\"UnityEngine.InputSystem.InputAction.performed\" /> or <see cref=\"UnityEngine.InputSystem.InputAction.canceled\" />.");
+                    writer.DocSeeAlso(string.Concat(inputActionClassReference, "started"));
+                    writer.DocSeeAlso(string.Concat(inputActionClassReference, "performed"));
+                    writer.DocSeeAlso(string.Concat(inputActionClassReference, "canceled"));
+                    writer.WriteLine($"void On{methodName}(InputAction.CallbackContext context);");
+                }
+
+                writer.EndBlock();
+            }
+
+            // End class.
+            writer.EndBlock();
+
+            // End namespace.
+            if (haveNamespace)
+                writer.EndBlock();
+
+            return writer.buffer.ToString();
+        }
+
+        ////TODO: move this to a shared place
+        internal struct Writer
+        {
+            public StringBuilder buffer;
+            public int indentLevel;
+
+            public void BeginBlock()
+            {
+                WriteIndent();
+                buffer.Append("{\n");
+                ++indentLevel;
+            }
+
+            public void EndBlock()
+            {
+                --indentLevel;
+                WriteIndent();
+                buffer.Append("}\n");
+            }
+
+            public void WriteLine()
+            {
+                buffer.Append('\n');
+            }
+
+            public void WriteLine(string text)
+            {
+                if (!text.All(char.IsWhiteSpace))
+                {
+                    WriteIndent();
+                    buffer.Append(text);
+                }
+                buffer.Append('\n');
+            }
+
+            public void Write(string text)
+            {
+                buffer.Append(text);
+            }
+
+            public void WriteIndent()
+            {
+                for (var i = 0; i < indentLevel; ++i)
+                {
+                    for (var n = 0; n < kSpacesPerIndentLevel; ++n)
+                        buffer.Append(' ');
+                }
+            }
+
+            public void DocSummary(string text)
+            {
+                DocElement("summary", text);
+            }
+
+            public void DocParam(string paramName, string text)
+            {
+                WriteLine($"/// <param name=\"{paramName}\">{text}</param>");
+            }
+
+            public void DocRemarks(string text)
+            {
+                DocElement("remarks", text);
+            }
+
+            public void DocInherit(string cref)
+            {
+                DocReference("inheritdoc", cref);
+            }
+
+            public void DocSeeAlso(string cref)
+            {
+                DocReference("seealso", cref: cref);
+            }
+
+            public void DocExample(string code)
+            {
+                DocComment("<example>");
+                DocComment("<code>");
+
+                foreach (var line in code.Split('\n'))
+                    DocComment(line.Replace("<", "&lt;").Replace(">", "&gt;"));
+
+                DocComment("</code>");
+                DocComment("</example>");
+            }
+
+            private void DocComment(string text)
+            {
+                if (string.IsNullOrEmpty(text))
+                    WriteLine("///");
+                else
+                    WriteLine(string.Concat("/// ", text));
+            }
+
+            private void DocElement(string tag, string text)
+            {
+                DocComment($"<{tag}>");
+                DocComment(text);
+                DocComment($"</{tag}>");
+            }
+
+            private void DocReference(string tag, string cref)
+            {
+                DocInlineElement(tag, "cref", cref);
+            }
+
+            private void DocInlineElement(string tag, string property, string value)
+            {
+                DocComment($"<{tag} {property}=\"{value}\" />");
+            }
+        }
+
+        // Updates the given file with wrapper code generated for the given action sets.
+        // If the generated code is unchanged, does not touch the file.
+        // Returns true if the file was touched, false otherwise.
+        public static bool GenerateWrapperCode(string filePath, InputActionAsset asset, Options options)
+        {
+            if (!Path.HasExtension(filePath))
+                filePath += ".cs";
+
+            // Generate code.
+            var code = GenerateWrapperCode(asset, options);
+
+            // Check if the code changed. Don't write if it hasn't.
+            if (File.Exists(filePath))
+            {
+                var existingCode = File.ReadAllText(filePath);
+                if (existingCode == code || existingCode.WithAllWhitespaceStripped() == code.WithAllWhitespaceStripped())
+                    return false;
+            }
+
+            // Write.
+            EditorHelpers.CheckOut(filePath);
+            File.WriteAllText(filePath, code);
+            return true;
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionCodeGenerator.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: a85130d4e1e5b49878f8f51b2d4e0ded
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionImporter.cs

@@ -0,0 +1,460 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using UnityEditor;
+using UnityEditor.AssetImporters;
+using UnityEngine.InputSystem.Utilities;
+
+////FIXME: The importer accesses icons through the asset db (which EditorGUIUtility.LoadIcon falls back on) which will
+////       not yet have been imported when the project is imported from scratch; this results in errors in the log and in generic
+////       icons showing up for the assets
+
+#pragma warning disable 0649
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Imports an <see cref="InputActionAsset"/> from JSON.
+    /// </summary>
+    /// <remarks>
+    /// Can generate code wrappers for the contained action sets as a convenience.
+    /// Will not overwrite existing wrappers except if the generated code actually differs.
+    /// </remarks>
+    [ScriptedImporter(kVersion, InputActionAsset.Extension)]
+    internal class InputActionImporter : ScriptedImporter
+    {
+        private const int kVersion = 14;
+
+        [SerializeField] private bool m_GenerateWrapperCode;
+        [SerializeField] private string m_WrapperCodePath;
+        [SerializeField] private string m_WrapperClassName;
+        [SerializeField] private string m_WrapperCodeNamespace;
+
+        private static InlinedArray<Action> s_OnImportCallbacks;
+
+        public static event Action onImport
+        {
+            add => s_OnImportCallbacks.Append(value);
+            remove => s_OnImportCallbacks.Remove(value);
+        }
+
+        private static InputActionAsset CreateFromJson(AssetImportContext context)
+        {
+            ////REVIEW: need to check with version control here?
+            // Read JSON file.
+            string content;
+            try
+            {
+                content = File.ReadAllText(EditorHelpers.GetPhysicalPath(context.assetPath));
+            }
+            catch (Exception exception)
+            {
+                context.LogImportError($"Could not read file '{context.assetPath}' ({exception})");
+                return null;
+            }
+
+            // Create asset.
+            var asset = ScriptableObject.CreateInstance<InputActionAsset>();
+
+            // Parse JSON and configure asset.
+            try
+            {
+                // Attempt to parse JSON
+                asset.LoadFromJson(content);
+                // Make sure action map names are unique within JSON file
+                var names = new HashSet<string>();
+                foreach (var map in asset.actionMaps)
+                {
+                    if (!names.Add(map.name))
+                    {
+                        throw new Exception(
+                            "Unable to parse {context.assetPath} due to duplicate Action Map name: '{map.name}'. Make sure Action Map names are unique within the asset and reattempt import.");
+                    }
+                }
+
+                // Make sure action names are unique within each action map in JSON file
+                names.Clear();
+                foreach (var map in asset.actionMaps)
+                {
+                    foreach (var action in map.actions)
+                    {
+                        if (!names.Add(action.name))
+                        {
+                            throw new Exception(
+                                $"Unable to parse {{context.assetPath}} due to duplicate Action name: '{action.name}' within Action Map '{map.name}'. Make sure Action Map names are unique within the asset and reattempt import.");
+                        }
+                    }
+
+                    names.Clear();
+                }
+
+                // Force name of asset to be that on the file on disk instead of what may be serialized
+                // as the 'name' property in JSON. (Unless explicitly given)
+                asset.name = NameFromAssetPath(context.assetPath);
+
+                // Add asset.
+                ////REVIEW: the icons won't change if the user changes skin; not sure it makes sense to differentiate here
+                context.AddObjectToAsset("<root>", asset, InputActionAssetIconLoader.LoadAssetIcon());
+                context.SetMainObject(asset);
+
+                // Make sure all the elements in the asset have GUIDs and that they are indeed unique.
+                // Create sub-assets for each action to allow search and editor referencing/picking.
+                SetupAsset(asset, context.AddObjectToAsset);
+            }
+            catch (Exception exception)
+            {
+                context.LogImportError($"Could not parse input actions in JSON format from '{context.assetPath}' ({exception})");
+                DestroyImmediate(asset);
+                asset = null;
+            }
+
+            return asset;
+        }
+
+        public override void OnImportAsset(AssetImportContext ctx)
+        {
+            if (ctx == null)
+                throw new ArgumentNullException(nameof(ctx));
+
+            foreach (var callback in s_OnImportCallbacks)
+                callback();
+
+            var asset = CreateFromJson(ctx);
+            if (asset == null)
+                return;
+
+            if (m_GenerateWrapperCode && HasMapWithSameNameAsAsset(asset, m_WrapperClassName))
+            {
+                ctx.LogImportError(
+                    $"{asset.name}: An action map in an .inputactions asset cannot be named the same as the asset itself if 'Generate C# Class' is used. "
+                    + "You can rename the action map in the asset, rename the asset itself or assign a different C# class name in the import settings.");
+            }
+        }
+
+        internal static void SetupAsset(InputActionAsset asset)
+        {
+            SetupAsset(asset, (identifier, subAsset, icon) =>
+                AssetDatabase.AddObjectToAsset(subAsset, asset));
+        }
+
+        private delegate void AddObjectToAsset(string identifier, Object subAsset, Texture2D icon);
+
+        private static void SetupAsset(InputActionAsset asset, AddObjectToAsset addObjectToAsset)
+        {
+            FixMissingGuids(asset);
+            CreateInputActionReferences(asset, addObjectToAsset);
+        }
+
+        private static void FixMissingGuids(InputActionAsset asset)
+        {
+            // Make sure all the elements in the asset have GUIDs and that they are indeed unique.
+            foreach (var map in asset.actionMaps)
+            {
+                // Make sure action map has GUID.
+                if (string.IsNullOrEmpty(map.m_Id) || asset.actionMaps.Count(x => x.m_Id == map.m_Id) > 1)
+                    map.GenerateId();
+
+                // Make sure all actions have GUIDs.
+                foreach (var action in map.actions)
+                {
+                    var actionId = action.m_Id;
+                    if (string.IsNullOrEmpty(actionId) || asset.actionMaps.Sum(m => m.actions.Count(a => a.m_Id == actionId)) > 1)
+                        action.GenerateId();
+                }
+
+                // Make sure all bindings have GUIDs.
+                for (var i = 0; i < map.m_Bindings.LengthSafe(); ++i)
+                {
+                    var bindingId = map.m_Bindings[i].m_Id;
+                    if (string.IsNullOrEmpty(bindingId) || asset.actionMaps.Sum(m => m.bindings.Count(b => b.m_Id == bindingId)) > 1)
+                        map.m_Bindings[i].GenerateId();
+                }
+            }
+        }
+
+        private static void CreateInputActionReferences(InputActionAsset asset, AddObjectToAsset addObjectToAsset)
+        {
+            var actionIcon = InputActionAssetIconLoader.LoadActionIcon();
+            foreach (var map in asset.actionMaps)
+            {
+                foreach (var action in map.actions)
+                {
+                    // Note that it is important action is set before being added to asset, otherwise the immutability
+                    // check within InputActionReference would throw.
+                    var actionReference = ScriptableObject.CreateInstance<InputActionReference>();
+                    actionReference.Set(action);
+                    addObjectToAsset(action.m_Id, actionReference, actionIcon);
+
+                    // Backwards-compatibility (added for 1.0.0-preview.7).
+                    // We used to call AddObjectToAsset using objectName instead of action.m_Id as the object name. This fed
+                    // the action name (*and* map name) into the hash generation that was used as the basis for the file ID
+                    // object the InputActionReference object. Thus, if the map and/or action name changed, the file ID would
+                    // change and existing references to the InputActionReference object would become invalid.
+                    //
+                    // What we do here is add another *hidden* InputActionReference object with the same content to the
+                    // asset. This one will use the old file ID and thus preserve backwards-compatibility. We should be able
+                    // to remove this for 2.0.
+                    //
+                    // Case: https://fogbugz.unity3d.com/f/cases/1229145/
+                    var backcompatActionReference = Instantiate(actionReference);
+                    backcompatActionReference.name = actionReference.name; // Get rid of the (Clone) suffix.
+                    backcompatActionReference.hideFlags = HideFlags.HideInHierarchy;
+                    addObjectToAsset(actionReference.name, backcompatActionReference, actionIcon);
+                }
+            }
+        }
+
+        private static bool HasMapWithSameNameAsAsset(InputActionAsset asset, string codeClassName)
+        {
+            // When using code generation, it is an error for any action map to be named the same as the asset itself.
+            // https://fogbugz.unity3d.com/f/cases/1212052/
+            var className = !string.IsNullOrEmpty(codeClassName) ? codeClassName : CSharpCodeHelpers.MakeTypeName(asset.name);
+            return (asset.actionMaps.Any(x =>
+                CSharpCodeHelpers.MakeTypeName(x.name) == className ||
+                CSharpCodeHelpers.MakeIdentifier(x.name) == className));
+        }
+
+        private static void GenerateWrapperCode(string assetPath, InputActionAsset asset, string codeNamespace, string codeClassName, string codePath)
+        {
+            if (HasMapWithSameNameAsAsset(asset, codeClassName))
+                return;
+
+            var wrapperFilePath = codePath;
+            if (string.IsNullOrEmpty(wrapperFilePath))
+            {
+                // Placed next to .inputactions file.
+                var directory = Path.GetDirectoryName(assetPath);
+                var fileName = Path.GetFileNameWithoutExtension(assetPath);
+                wrapperFilePath = Path.Combine(directory, fileName) + ".cs";
+            }
+            else if (wrapperFilePath.StartsWith("./") || wrapperFilePath.StartsWith(".\\") ||
+                     wrapperFilePath.StartsWith("../") || wrapperFilePath.StartsWith("..\\"))
+            {
+                // User-specified file relative to location of .inputactions file.
+                var directory = Path.GetDirectoryName(assetPath);
+                wrapperFilePath = Path.Combine(directory, wrapperFilePath);
+            }
+            else if (!wrapperFilePath.StartsWith("assets/", StringComparison.InvariantCultureIgnoreCase) &&
+                     !wrapperFilePath.StartsWith("assets\\", StringComparison.InvariantCultureIgnoreCase))
+            {
+                // User-specified file in Assets/ folder.
+                wrapperFilePath = Path.Combine("Assets", wrapperFilePath);
+            }
+
+            var dir = Path.GetDirectoryName(wrapperFilePath);
+            if (!Directory.Exists(dir))
+                Directory.CreateDirectory(dir);
+
+            // Check for the case where the target file already exists.
+            // If it does, we don't want to overwrite it unless it's been generated by us before.
+            if (File.Exists(wrapperFilePath))
+            {
+                var text = File.ReadAllText(wrapperFilePath);
+                var autoGeneratedMarker = "This code was auto-generated by com.unity.inputsystem";
+                if (!text.Contains(autoGeneratedMarker))
+                {
+                    throw new Exception($"The target file for Input Actions code generation already exists: {wrapperFilePath}. Since it doesn't look to contain Input generated code that we can safely overwrite, we stopped to prevent any data loss. Consider renaming. ");
+                }
+            }
+
+            var options = new InputActionCodeGenerator.Options
+            {
+                sourceAssetPath = assetPath,
+                namespaceName = codeNamespace,
+                className = codeClassName,
+            };
+
+
+            if (InputActionCodeGenerator.GenerateWrapperCode(wrapperFilePath, asset, options))
+            {
+                // This isn't ideal and may have side effects, but we cannot avoid compiling again.
+                // Previously we attempted to run a EditorApplication.delayCall += AssetDatabase.Refresh
+                // but this would lead to "error: Error building Player because scripts are compiling" in CI.
+                // Previous comment here warned against not being able to reimport here directly, but it seems it's ok.
+                AssetDatabase.ImportAsset(wrapperFilePath);
+            }
+        }
+
+        internal static IEnumerable<InputActionReference> LoadInputActionReferencesFromAsset(string assetPath)
+        {
+            // Get all InputActionReferences are stored at the same asset path as InputActionAsset
+            // Note we exclude 'hidden' action references (which are present to support one of the pre releases)
+            return AssetDatabase.LoadAllAssetsAtPath(assetPath).Where(
+                o => o is InputActionReference &&
+                !((InputActionReference)o).hideFlags.HasFlag(HideFlags.HideInHierarchy))
+                .Cast<InputActionReference>();
+        }
+
+        private static readonly string[] s_DefaultAssetSearchFolders = new string[] { "Assets" };
+
+        /// <summary>
+        /// Gets all <see cref="InputActionReference"/> instances available in assets in the project.
+        /// By default, it only gets the assets located in the "Assets" folder.
+        /// </summary>
+        /// <param name="foldersPath">Optional array of directory paths to be searched.</param>
+        /// <param name="skipProjectWide">If true, excludes project-wide input actions from the result.</param>
+        /// <returns></returns>
+        internal static IEnumerable<InputActionReference> LoadInputActionReferencesFromAssetDatabase(
+            string[] foldersPath = null, bool skipProjectWide = false)
+        {
+            // Get all InputActionReference from assets in "Asset" folder by default.
+            // It does not search inside "Packages" folder.
+            const string inputActionReferenceFilter = "t:" +  nameof(InputActionReference);
+            var inputActionReferenceGUIDs = AssetDatabase.FindAssets(inputActionReferenceFilter,
+                foldersPath ?? s_DefaultAssetSearchFolders);
+
+            // To find all the InputActionReferences, the GUID of the asset containing at least one action reference is
+            // used to find the asset path. This is because InputActionReferences are stored in the asset database as sub-assets of InputActionAsset.
+            // Then the whole asset is loaded and all the InputActionReferences are extracted from it.
+            // Also, the action references are duplicated to have backwards compatibility with the 1.0.0-preview.7. That
+            // is why we look for references withouth the `HideFlags.HideInHierarchy` flag.
+            var inputActionReferencesList = new List<InputActionReference>();
+            foreach (var guid in inputActionReferenceGUIDs)
+            {
+                var assetPath = AssetDatabase.GUIDToAssetPath(guid);
+                foreach (var assetInputActionReference in LoadInputActionReferencesFromAsset(assetPath))
+                {
+                    if (skipProjectWide && assetInputActionReference.m_Asset == InputSystem.actions)
+                        continue;
+
+                    inputActionReferencesList.Add(assetInputActionReference);
+                }
+            }
+            return inputActionReferencesList;
+        }
+
+        // Add item to plop an .inputactions asset into the project.
+        [MenuItem("Assets/Create/Input Actions")]
+        public static void CreateInputAsset()
+        {
+            ProjectWindowUtil.CreateAssetWithContent("New Actions." + InputActionAsset.Extension,
+                InputActionAsset.kDefaultAssetLayoutJson, InputActionAssetIconLoader.LoadAssetIcon());
+        }
+
+        // File extension of the associated asset
+        private const string kFileExtension = "." + InputActionAsset.Extension;
+
+        // Evaluates whether the given path is a path to an asset of the associated type based on extension.
+        public static bool IsInputActionAssetPath(string path)
+        {
+            return path != null && path.EndsWith(kFileExtension, StringComparison.InvariantCultureIgnoreCase);
+        }
+
+        // Returns a suitable object name for an asset based on its path.
+        public static string NameFromAssetPath(string assetPath)
+        {
+            Debug.Assert(IsInputActionAssetPath(assetPath));
+            return Path.GetFileNameWithoutExtension(assetPath);
+        }
+
+        private static bool ContainsInputActionAssetPath(string[] assetPaths)
+        {
+            foreach (var assetPath in assetPaths)
+            {
+                if (IsInputActionAssetPath(assetPath))
+                    return true;
+            }
+
+            return false;
+        }
+
+        // This processor was added to address this issue:
+        // https://issuetracker.unity3d.com/product/unity/issues/guid/ISXB-749
+        //
+        // When an action asset is renamed, copied, or moved in the Editor, the "Name" field in the JSON will
+        // hold the old name and won't match the asset objects name in memory which is set based on the filename
+        // by the scripted imported. To avoid this, this asset post-processor detects any imported or moved assets
+        // with a JSON name property not matching the importer assigned name and updates the JSON name based on this.
+        // This basically solves any problem related to unmodified assets.
+        //
+        // Note that JSON names have no relevance for editor workflows and are basically ignored by the importer.
+        // Note that JSON names may be the only way to identify assets loaded from non-file sources or via
+        // UnityEngine.Resources in run-time.
+        //
+        // Note that if an asset is is imported and a name mismatch is detected, the asset will be modified and
+        // imported again, which will yield yet another callback to the post-processor. For the second iteration,
+        // the name will no longer be a mismatch and the cycle will be aborted.
+        private class InputActionJsonNameModifierAssetProcessor : AssetPostprocessor
+        {
+            private static void OnPostprocessAllAssets(string[] importedAssets, string[] deletedAssets,
+                string[] movedAssets, string[] movedFromAssetPaths)
+            {
+                var needToInvalidate = false;
+                foreach (var assetPath in importedAssets)
+                {
+                    if (IsInputActionAssetPath(assetPath))
+                    {
+                        // Generate C# code from asset if configured via importer settings.
+                        // We generate from a parsed temporary asset here since loading the asset won't work here.
+                        var importer = GetAtPath(assetPath) as InputActionImporter;
+                        if (importer != null && importer.m_GenerateWrapperCode)
+                        {
+                            try
+                            {
+                                var asset = InputActionAsset.FromJson(File.ReadAllText(assetPath));
+                                GenerateWrapperCode(assetPath, asset, importer.m_WrapperCodeNamespace,
+                                    importer.m_WrapperClassName, importer.m_WrapperCodePath);
+                            }
+                            catch (Exception e)
+                            {
+                                Debug.LogException(e);
+                            }
+                        }
+
+                        needToInvalidate = true;
+                        CheckAndRenameJsonNameIfDifferent(assetPath);
+                    }
+                }
+
+                if (!needToInvalidate)
+                    needToInvalidate = ContainsInputActionAssetPath(deletedAssets);
+                if (!needToInvalidate)
+                    needToInvalidate = ContainsInputActionAssetPath(movedAssets);
+                if (!needToInvalidate)
+                    needToInvalidate = ContainsInputActionAssetPath(movedFromAssetPaths);
+
+                // Invalidate all references to make sure there are no dangling references after reimport among
+                // our "live objects. We only need to invalidate loaded sub-assets and not assets/prefabs/SO etc
+                // since they may still contain effectively obsolete InputActionReferences but those references
+                // will resolve.
+                if (needToInvalidate)
+                    InputActionReference.InvalidateAll();
+            }
+
+            private static void CheckAndRenameJsonNameIfDifferent(string assetPath)
+            {
+                InputActionAsset asset = null;
+                try
+                {
+                    if (!File.Exists(assetPath))
+                        return;
+
+                    // Evaluate whether JSON name corresponds to desired name
+                    asset = InputActionAsset.FromJson(File.ReadAllText(assetPath));
+                    var desiredName = Path.GetFileNameWithoutExtension(assetPath);
+                    if (asset.name == desiredName)
+                        return;
+
+                    // Update JSON name by modifying the asset
+                    asset.name = desiredName;
+                    if (!EditorHelpers.WriteAsset(assetPath, asset.ToJson()))
+                    {
+                        Debug.LogError($"Unable to change JSON name for asset at \"{assetPath}\" since the asset-path could not be checked-out as editable in the underlying version-control system.");
+                    }
+                }
+                catch (Exception ex)
+                {
+                    Debug.LogException(ex);
+                }
+                finally
+                {
+                    if (asset != null)
+                        DestroyImmediate(asset);
+                }
+            }
+        }
+    }
+}
+
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionImporter.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 8404be70184654265930450def6a9037
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionImporterEditor.cs

@@ -0,0 +1,150 @@
+#if UNITY_EDITOR
+using System;
+using System.IO;
+using UnityEngine.InputSystem.Utilities;
+using UnityEditor;
+using UnityEditor.AssetImporters;
+
+////TODO: support for multi-editing
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Custom editor that allows modifying importer settings for an <see cref="InputActionImporter"/>.
+    /// </summary>
+    [CustomEditor(typeof(InputActionImporter))]
+    internal class InputActionImporterEditor : ScriptedImporterEditor
+    {
+        public override void OnInspectorGUI()
+        {
+            var inputActionAsset = GetAsset();
+
+            // ScriptedImporterEditor in 2019.2 now requires explicitly updating the SerializedObject
+            // like in other types of editors.
+            serializedObject.Update();
+
+            EditorGUILayout.Space();
+
+            if (inputActionAsset == null)
+                EditorGUILayout.HelpBox("The currently selected object is not an editable input action asset.",
+                    MessageType.Info);
+
+            // Button to pop up window to edit the asset.
+            using (new EditorGUI.DisabledScope(inputActionAsset == null))
+            {
+                if (GUILayout.Button(GetOpenEditorButtonText(inputActionAsset), GUILayout.Height(30)))
+                    OpenEditor(inputActionAsset);
+            }
+
+            EditorGUILayout.Space();
+
+            // Project-wide Input Actions Asset UI.
+            InputAssetEditorUtils.DrawMakeActiveGui(InputSystem.actions, inputActionAsset,
+                inputActionAsset ? inputActionAsset.name : "Null", "Project-wide Input Actions",
+                (value) => InputSystem.actions = value, !EditorApplication.isPlayingOrWillChangePlaymode);
+
+            EditorGUILayout.Space();
+
+            // Importer settings UI.
+            var generateWrapperCodeProperty = serializedObject.FindProperty("m_GenerateWrapperCode");
+            EditorGUILayout.PropertyField(generateWrapperCodeProperty, m_GenerateWrapperCodeLabel);
+            if (generateWrapperCodeProperty.boolValue)
+            {
+                var wrapperCodePathProperty = serializedObject.FindProperty("m_WrapperCodePath");
+                var wrapperClassNameProperty = serializedObject.FindProperty("m_WrapperClassName");
+                var wrapperCodeNamespaceProperty = serializedObject.FindProperty("m_WrapperCodeNamespace");
+
+                EditorGUILayout.BeginHorizontal();
+
+                string defaultFileName = "";
+                if (inputActionAsset != null)
+                {
+                    var assetPath = AssetDatabase.GetAssetPath(inputActionAsset);
+                    defaultFileName = Path.ChangeExtension(assetPath, ".cs");
+                }
+
+                wrapperCodePathProperty.PropertyFieldWithDefaultText(m_WrapperCodePathLabel, defaultFileName);
+
+                if (GUILayout.Button("…", EditorStyles.miniButton, GUILayout.MaxWidth(20)))
+                {
+                    var fileName = EditorUtility.SaveFilePanel("Location for generated C# file",
+                        Path.GetDirectoryName(defaultFileName),
+                        Path.GetFileName(defaultFileName), "cs");
+                    if (!string.IsNullOrEmpty(fileName))
+                    {
+                        if (fileName.StartsWith(Application.dataPath))
+                            fileName = "Assets/" + fileName.Substring(Application.dataPath.Length + 1);
+
+                        wrapperCodePathProperty.stringValue = fileName;
+                    }
+                }
+                EditorGUILayout.EndHorizontal();
+
+                string typeName = null;
+                if (inputActionAsset != null)
+                    typeName = CSharpCodeHelpers.MakeTypeName(inputActionAsset?.name);
+                wrapperClassNameProperty.PropertyFieldWithDefaultText(m_WrapperClassNameLabel, typeName ?? "<Class name>");
+
+                if (!CSharpCodeHelpers.IsEmptyOrProperIdentifier(wrapperClassNameProperty.stringValue))
+                    EditorGUILayout.HelpBox("Must be a valid C# identifier", MessageType.Error);
+
+                wrapperCodeNamespaceProperty.PropertyFieldWithDefaultText(m_WrapperCodeNamespaceLabel, "<Global namespace>");
+
+                if (!CSharpCodeHelpers.IsEmptyOrProperNamespaceName(wrapperCodeNamespaceProperty.stringValue))
+                    EditorGUILayout.HelpBox("Must be a valid C# namespace name", MessageType.Error);
+            }
+
+            // Using ApplyRevertGUI requires calling Update and ApplyModifiedProperties around the serializedObject,
+            // and will print warning messages otherwise (see warning message in ApplyRevertGUI implementation).
+            serializedObject.ApplyModifiedProperties();
+
+            ApplyRevertGUI();
+        }
+
+        private InputActionAsset GetAsset()
+        {
+            return assetTarget as InputActionAsset;
+        }
+
+        protected override bool ShouldHideOpenButton()
+        {
+            return IsProjectWideActionsAsset();
+        }
+
+        private bool IsProjectWideActionsAsset()
+        {
+            return IsProjectWideActionsAsset(GetAsset());
+        }
+
+        private static bool IsProjectWideActionsAsset(InputActionAsset asset)
+        {
+            return !ReferenceEquals(asset, null) && InputSystem.actions == asset;
+        }
+
+        private string GetOpenEditorButtonText(InputActionAsset asset)
+        {
+            if (IsProjectWideActionsAsset(asset))
+                return "Edit in Project Settings Window";
+
+            return "Edit Asset";
+        }
+
+        private static void OpenEditor(InputActionAsset asset)
+        {
+            // Redirect to Project-settings Input Actions editor if this is the project-wide actions asset
+            if (IsProjectWideActionsAsset(asset))
+            {
+                SettingsService.OpenProjectSettings(InputSettingsPath.kSettingsRootPath);
+                return;
+            }
+
+            InputActionsEditorWindow.OpenEditor(asset);
+        }
+
+        private readonly GUIContent m_GenerateWrapperCodeLabel = EditorGUIUtility.TrTextContent("Generate C# Class");
+        private readonly GUIContent m_WrapperCodePathLabel = EditorGUIUtility.TrTextContent("C# Class File");
+        private readonly GUIContent m_WrapperClassNameLabel = EditorGUIUtility.TrTextContent("C# Class Name");
+        private readonly GUIContent m_WrapperCodeNamespaceLabel = EditorGUIUtility.TrTextContent("C# Class Namespace");
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/AssetImporter/InputActionImporterEditor.cs.meta

@@ -0,0 +1,11 @@
+fileFormatVersion: 2
+guid: 50db2526021f1429e84687ad14aa0855
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/BuildPipeline.meta

@@ -0,0 +1,8 @@
+fileFormatVersion: 2
+guid: cb6feb90190641c19dce92f09614edd4
+folderAsset: yes
+DefaultImporter:
+  externalObjects: {}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 

Packages/com.unity.inputsystem/InputSystem/Editor/BuildPipeline/LinkFileGenerator.cs

@@ -0,0 +1,145 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Reflection;
+using System.Text;
+using UnityEngine.InputSystem.LowLevel;
+using UnityEditor.Build;
+using UnityEditor.Build.Reporting;
+using UnityEditor.Compilation;
+using UnityEditor.UnityLinker;
+using UnityEngine.InputSystem.Layouts;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Input system uses runtime reflection to instantiate and discover some capabilities like layouts, processors, interactions, etc.
+    /// Managed linker on high stripping modes is very keen on removing parts of classes or whole classes.
+    /// One way to preserve the classes is to put [Preserve] on class itself and every field/property we're interested in,
+    /// this was proven to be error prone as it's easy to forget an attribute and tedious as everything needs an attribute now.
+    ///
+    /// Instead this LinkFileGenerator inspects all types in the domain, and if they could be used via reflection,
+    /// we preserve them in all entirety.
+    ///
+    /// In a long run we would like to remove usage of reflection all together, and then this mechanism will be gone too.
+    ///
+    /// Beware, this uses "AppDomain.CurrentDomain.GetAssemblies" which returns editor assemblies,
+    /// but not all classes are available on all platforms, most of platform specific code is wrapped into defines like
+    /// "#if UNITY_EDITOR || UNITY_IOS || PACKAGE_DOCS_GENERATION", and when compiling for Android,
+    /// that particular class wouldn't be available in the final executable, though our link.xml here would still specify it,
+    /// potentially creating linker warnings that we need to later ignore.
+    /// </summary>
+    internal class LinkFileGenerator : IUnityLinkerProcessor
+    {
+        public int callbackOrder => 0;
+
+        public string GenerateAdditionalLinkXmlFile(BuildReport report, UnityLinkerBuildPipelineData data)
+        {
+            var currentAssemblyName = typeof(UnityEngine.InputSystem.InputSystem).Assembly.GetName().Name;
+
+            var typesByAssemblies = new Dictionary<System.Reflection.Assembly, Type[]>();
+            var assemblies = AppDomain.CurrentDomain.GetAssemblies();
+            foreach (var assembly in assemblies)
+            {
+                try
+                {
+                    // Skip any assembly that doesn't reference the input system assembly.
+                    if (assembly.GetName().Name != currentAssemblyName && !assembly
+                        .GetReferencedAssemblies().Any(x => x.Name == currentAssemblyName))
+                        continue;
+
+                    var types = assembly.GetTypes().Where(ShouldPreserveType).ToArray();
+                    if (types.Length > 0)
+                        typesByAssemblies.Add(assembly, types);
+                }
+                catch (ReflectionTypeLoadException)
+                {
+                    Debug.LogWarning($"Couldn't load types from assembly: {assembly.FullName}");
+                }
+            }
+
+            var sb = new StringBuilder();
+            sb.AppendLine("<linker>");
+
+            foreach (var assembly in typesByAssemblies.Keys.OrderBy(a => a.GetName().Name))
+            {
+                sb.AppendLine($"  <assembly fullname=\"{assembly.GetName().Name}\">");
+
+                var types = typesByAssemblies[assembly];
+                foreach (var type in types.OrderBy(t => t.FullName))
+                    sb.AppendLine(
+                        $"    <type fullname=\"{FormatForXml(ToCecilName(type.FullName))}\" preserve=\"all\"/>");
+
+                sb.AppendLine("  </assembly>");
+            }
+
+            sb.AppendLine("</linker>");
+
+            var linkXmlDirectory = Path.Combine(Application.dataPath, "..", "Library", "InputSystem");
+            var linkXmlFile = Path.Combine(linkXmlDirectory, $"{data.target}Link.xml");
+
+            Directory.CreateDirectory(linkXmlDirectory);
+            File.WriteAllText(linkXmlFile, sb.ToString());
+            return linkXmlFile;
+        }
+
+        static bool IsTypeUsedViaReflectionByInputSystem(Type type)
+        {
+            return type.IsSubclassOf(typeof(InputControl)) ||
+                typeof(IInputStateTypeInfo).IsAssignableFrom(type) ||
+                typeof(IInputInteraction).IsAssignableFrom(type) ||
+                typeof(InputProcessor).IsAssignableFrom(type) ||
+                typeof(InputBindingComposite).IsAssignableFrom(type) ||
+                type.GetCustomAttributes<InputControlAttribute>().Any();
+        }
+
+        static bool IsFieldRelatedToControlLayouts(FieldInfo field)
+        {
+            return IsTypeUsedViaReflectionByInputSystem(field.GetType()) ||
+                field.GetCustomAttributes<InputControlAttribute>().Any();
+        }
+
+        static bool IsPropertyRelatedToControlLayouts(PropertyInfo property)
+        {
+            return IsTypeUsedViaReflectionByInputSystem(property.GetType()) ||
+                property.GetCustomAttributes<InputControlAttribute>().Any();
+        }
+
+        static bool ShouldPreserveType(Type type)
+        {
+            if (IsTypeUsedViaReflectionByInputSystem(type))
+                return true;
+
+            foreach (var field in type.GetFields())
+                if (IsFieldRelatedToControlLayouts(field))
+                    return true;
+
+            foreach (var property in type.GetProperties())
+                if (IsPropertyRelatedToControlLayouts(property))
+                    return true;
+
+            return false;
+        }
+
+        static string ToCecilName(string fullTypeName)
+        {
+            return fullTypeName.Replace('+', '/');
+        }
+
+        static string FormatForXml(string value)
+        {
+            return value.Replace("&", "&amp;").Replace("<", "&lt;").Replace(">", "&gt;");
+        }
+
+        public void OnBeforeRun(BuildReport report, UnityLinkerBuildPipelineData data)
+        {
+        }
+
+        public void OnAfterRun(BuildReport report, UnityLinkerBuildPipelineData data)
+        {
+        }
+    }
+}
+#endif

Packages/com.unity.inputsystem/InputSystem/Editor/BuildPipeline/LinkFileGenerator.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/IInputControlPickerLayout.cs

@@ -0,0 +1,13 @@
+#if UNITY_EDITOR
+using UnityEngine.InputSystem.Layouts;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal interface IInputControlPickerLayout
+    {
+        void AddControlItem(InputControlPickerDropdown dropdown, DeviceDropdownItem parent,
+            ControlDropdownItem parentControl,
+            InputControlLayout.ControlItem control, string device, string usage, bool searchable);
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/IInputControlPickerLayout.cs.meta

@@ -0,0 +1,11 @@
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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlDropdownItem.cs

@@ -0,0 +1,139 @@
+#if UNITY_EDITOR
+using System.Text;
+using UnityEditor;
+using UnityEngine.InputSystem.Layouts;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal abstract class InputControlDropdownItem : AdvancedDropdownItem
+    {
+        protected string m_ControlPath;
+        protected string m_Device;
+        protected string m_Usage;
+        protected bool m_Searchable;
+
+        public string controlPath => m_ControlPath;
+
+        public virtual string controlPathWithDevice
+        {
+            get
+            {
+                var path = new StringBuilder($"<{m_Device}>");
+                if (!string.IsNullOrEmpty(m_Usage))
+                    path.Append($"{{{m_Usage}}}");
+                if (!string.IsNullOrEmpty(m_ControlPath))
+                    path.Append($"/{m_ControlPath}");
+                return path.ToString();
+            }
+        }
+
+        public override string searchableName
+        {
+            get
+            {
+                // ToHumanReadableString is expensive, especially given that we build the whole tree
+                // every time the control picker comes up. Build searchable names only on demand
+                // to save some time.
+                if (m_SearchableName == null)
+                {
+                    if (m_Searchable)
+                        m_SearchableName = InputControlPath.ToHumanReadableString(controlPathWithDevice);
+                    else
+                        m_SearchableName = string.Empty;
+                }
+                return m_SearchableName;
+            }
+        }
+
+        protected InputControlDropdownItem(string name)
+            : base(name) {}
+    }
+
+    // NOTE: Optional control items, unlike normal control items, are displayed with their internal control
+    //       names rather that their display names. The reason is that we're looking at controls that have
+    //       the same internal name in one or more derived layouts but each of those derived layouts may
+    //       give the control a different display name.
+    //
+    //       Also, if we generate a control path for an optional binding, InputControlPath.ToHumanReadableName()
+    //       not find the referenced control on the referenced device layout and will thus not be able to
+    //       find a display name for it either. So, in the binding UI, these paths will also show with their
+    //       internal control names rather than display names.
+    internal sealed class OptionalControlDropdownItem : InputControlDropdownItem
+    {
+        public OptionalControlDropdownItem(EditorInputControlLayoutCache.OptionalControl optionalControl, string deviceControlId, string commonUsage)
+            : base(optionalControl.name)
+        {
+            m_ControlPath = optionalControl.name;
+            m_Device = deviceControlId;
+            m_Usage = commonUsage;
+            // Not searchable.
+        }
+    }
+
+    internal sealed class ControlUsageDropdownItem : InputControlDropdownItem
+    {
+        public override string controlPathWithDevice => BuildControlPath();
+        private string BuildControlPath()
+        {
+            if (m_Device == "*")
+            {
+                var path = new StringBuilder(m_Device);
+                if (!string.IsNullOrEmpty(m_Usage))
+                    path.Append($"{{{m_Usage}}}");
+                if (!string.IsNullOrEmpty(m_ControlPath))
+                    path.Append($"/{m_ControlPath}");
+                return path.ToString();
+            }
+            else
+                return base.controlPathWithDevice;
+        }
+
+        public ControlUsageDropdownItem(string device, string usage, string controlUsage)
+            : base(usage)
+        {
+            m_Device = string.IsNullOrEmpty(device) ? "*" : device;
+            m_Usage = usage;
+            m_ControlPath = $"{{{ controlUsage }}}";
+            name = controlUsage;
+            id = controlPathWithDevice.GetHashCode();
+            m_Searchable = true;
+        }
+    }
+
+    internal sealed class DeviceDropdownItem : InputControlDropdownItem
+    {
+        public DeviceDropdownItem(InputControlLayout layout, string usage = null, bool searchable = true)
+            : base(layout.m_DisplayName ?? ObjectNames.NicifyVariableName(layout.name))
+        {
+            m_Device = layout.name;
+            m_Usage = usage;
+            if (usage != null)
+                name += " (" + usage + ")";
+            id = name.GetHashCode();
+            m_Searchable = searchable;
+        }
+    }
+
+    internal sealed class ControlDropdownItem : InputControlDropdownItem
+    {
+        public ControlDropdownItem(ControlDropdownItem parent, string controlName, string displayName, string device, string usage, bool searchable)
+            : base("")
+        {
+            m_Device = device;
+            m_Usage = usage;
+            m_Searchable = searchable;
+
+            if (parent != null)
+                m_ControlPath = $"{parent.controlPath}/{controlName}";
+            else
+                m_ControlPath = controlName;
+
+            name = !string.IsNullOrEmpty(displayName) ? displayName : ObjectNames.NicifyVariableName(controlName);
+
+            id = controlPathWithDevice.GetHashCode();
+            indent = parent?.indent + 1 ?? 0;
+        }
+    }
+}
+
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlDropdownItem.cs.meta

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+  defaultReferences: []
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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPathEditor.cs

@@ -0,0 +1,223 @@
+#if UNITY_EDITOR || PACKAGE_DOCS_GENERATION
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using UnityEditor;
+using UnityEngine.InputSystem.Layouts;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Custom editor UI for editing control paths.
+    /// </summary>
+    /// <remarks>
+    /// This is the implementation underlying <see cref="InputControlPathDrawer"/>. It is useful primarily when
+    /// greater control is required than is offered by the <see cref="PropertyDrawer"/> mechanism. In particular,
+    /// it allows applying additional constraints such as requiring control paths to match ...
+    /// </remarks>
+    public sealed class InputControlPathEditor : IDisposable
+    {
+        /// <summary>
+        /// Initialize the control path editor.
+        /// </summary>
+        /// <param name="pathProperty"><see cref="string"/> type property that will receive the picked input control path.</param>
+        /// <param name="pickerState">Persistent editing state of the path editor. Used to retain state across domain reloads.</param>
+        /// <param name="onModified">Delegate that is called when the path has been modified.</param>
+        /// <param name="label">Optional label to display instead of display name of <paramref name="pathProperty"/>.</param>
+        /// <exception cref="ArgumentNullException"><paramref name="pathProperty"/> is <c>null</c>.</exception>
+        public InputControlPathEditor(SerializedProperty pathProperty, InputControlPickerState pickerState, Action onModified, GUIContent label = null)
+        {
+            if (pathProperty == null)
+                throw new ArgumentNullException(nameof(pathProperty));
+
+            this.pathProperty = pathProperty;
+            this.onModified = onModified;
+            m_PickerState = pickerState ?? new InputControlPickerState();
+            m_PathLabel = label ?? new GUIContent(pathProperty.displayName, pathProperty.GetTooltip());
+        }
+
+        public void Dispose()
+        {
+            m_PickerDropdown?.Dispose();
+        }
+
+        public void SetControlPathsToMatch(IEnumerable<string> controlPaths)
+        {
+            m_ControlPathsToMatch = controlPaths.ToArray();
+            m_PickerDropdown?.SetControlPathsToMatch(m_ControlPathsToMatch);
+        }
+
+        /// <summary>
+        /// Constrain the type of control layout that can be picked.
+        /// </summary>
+        /// <param name="expectedControlLayout">Name of the layout. This it the name as registered with
+        /// <see cref="InputSystem.RegisterLayout"/>.</param>.
+        /// <remarks>
+        /// <example>
+        /// <code>
+        /// // Pick only button controls.
+        /// editor.SetExpectedControlLayout("Button");
+        /// </code>
+        /// </example>
+        /// </remarks>
+        public void SetExpectedControlLayout(string expectedControlLayout)
+        {
+            m_ExpectedControlLayout = expectedControlLayout;
+            m_PickerDropdown?.SetExpectedControlLayout(m_ExpectedControlLayout);
+        }
+
+        public void SetExpectedControlLayoutFromAttribute()
+        {
+            var field = pathProperty.GetField();
+            if (field == null)
+                return;
+
+            var attribute = field.GetCustomAttribute<InputControlAttribute>();
+            if (attribute != null)
+                SetExpectedControlLayout(attribute.layout);
+        }
+
+        public void OnGUI()
+        {
+            EditorGUILayout.BeginHorizontal();
+            ////FIXME: for some reason, the left edge doesn't align properly in GetRect()'s result; indentation issue?
+            var rect = GUILayoutUtility.GetRect(0, EditorGUIUtility.singleLineHeight);
+            rect.x += EditorGUIUtility.standardVerticalSpacing + 2;
+            rect.width -= EditorGUIUtility.standardVerticalSpacing * 2 + 4;
+            OnGUI(rect);
+            EditorGUILayout.EndHorizontal();
+        }
+
+        public void OnGUI(Rect rect, GUIContent label = null, SerializedProperty property = null, Action modifiedCallback = null)
+        {
+            var pathLabel = label ?? m_PathLabel;
+            var serializedProperty = property ?? pathProperty;
+
+            var lineRect = rect;
+            var labelRect = lineRect;
+            labelRect.width = EditorStyles.label.CalcSize(pathLabel).x + 20; // Fit to label with some padding
+            EditorGUI.LabelField(labelRect, pathLabel);
+            lineRect.x += labelRect.width;
+            lineRect.width -= labelRect.width;
+
+            var bindingTextRect = lineRect;
+            var editButtonRect = lineRect;
+
+            bindingTextRect.x = labelRect.x + labelRect.width; // Place directly after labelRect
+            editButtonRect.x += lineRect.width - 20; // Place at the edge of the window to appear after bindingTextRect
+            bindingTextRect.width = editButtonRect.x - bindingTextRect.x; // bindingTextRect fills remaining space between label and editButton
+            editButtonRect.width = 20;
+            editButtonRect.height = 15;
+
+            var path = String.Empty;
+            try
+            {
+                path = serializedProperty.stringValue;
+            }
+            catch
+            {
+                // This try-catch block is a temporary fix for ISX-1436
+                // The plan is to convert InputControlPathEditor entirely to UITK and therefore this fix will
+                // no longer be required.
+                return;
+            }
+
+            ////TODO: this should be cached; generates needless GC churn
+            var displayName = InputControlPath.ToHumanReadableString(path);
+
+            // Either show dropdown control that opens path picker or show path directly as
+            // text, if manual path editing is toggled on.
+            if (m_PickerState.manualPathEditMode)
+            {
+                ////FIXME: for some reason the text field does not fill all the rect but rather adds large padding on the left
+                bindingTextRect.x -= 15;
+                bindingTextRect.width += 15;
+
+                EditorGUI.BeginChangeCheck();
+                path = EditorGUI.DelayedTextField(bindingTextRect, path);
+                if (EditorGUI.EndChangeCheck())
+                {
+                    serializedProperty.stringValue = path;
+                    serializedProperty.serializedObject.ApplyModifiedProperties();
+                    (modifiedCallback ?? onModified).Invoke();
+                }
+            }
+            else
+            {
+                // Dropdown that shows binding text and allows opening control picker.
+                if (EditorGUI.DropdownButton(bindingTextRect, new GUIContent(displayName), FocusType.Keyboard))
+                {
+                    SetExpectedControlLayoutFromAttribute(serializedProperty);
+                    ////TODO: for bindings that are part of composites, use the layout information from the [InputControl] attribute on the field
+                    ShowDropdown(bindingTextRect, serializedProperty, modifiedCallback ?? onModified);
+                }
+            }
+
+            // Button to toggle between text edit mode.
+            m_PickerState.manualPathEditMode = GUI.Toggle(editButtonRect, m_PickerState.manualPathEditMode, "T",
+                EditorStyles.miniButton);
+        }
+
+        private void ShowDropdown(Rect rect, SerializedProperty serializedProperty, Action modifiedCallback)
+        {
+            InputActionsEditorSettingsProvider.SetIMGUIDropdownVisible(true, false);
+            IsShowingDropdown = true;
+
+            if (m_PickerDropdown == null)
+            {
+                m_PickerDropdown = new InputControlPickerDropdown(
+                    m_PickerState,
+                    path =>
+                    {
+                        serializedProperty.stringValue = path;
+                        m_PickerState.manualPathEditMode = false;
+                        modifiedCallback();
+                    });
+            }
+
+            m_PickerDropdown.SetPickedCallback(path =>
+            {
+                serializedProperty.stringValue = path;
+                m_PickerState.manualPathEditMode = false;
+                modifiedCallback();
+            });
+
+            m_PickerDropdown.SetControlPathsToMatch(m_ControlPathsToMatch);
+            m_PickerDropdown.SetExpectedControlLayout(m_ExpectedControlLayout);
+
+            m_PickerDropdown.Show(rect);
+
+            IsShowingDropdown = false;
+        }
+
+        private void SetExpectedControlLayoutFromAttribute(SerializedProperty property)
+        {
+            var field = property.GetField();
+            if (field == null)
+                return;
+
+            var attribute = field.GetCustomAttribute<InputControlAttribute>();
+            if (attribute != null)
+                SetExpectedControlLayout(attribute.layout);
+        }
+
+        public SerializedProperty pathProperty { get; }
+        public Action onModified { get; }
+
+        private GUIContent m_PathLabel;
+        private string m_ExpectedControlLayout;
+        private string[] m_ControlPathsToMatch;
+
+        private InputControlPickerDropdown m_PickerDropdown;
+        private readonly InputControlPickerState m_PickerState;
+
+        /// <summary>
+        /// This property is only set from this class in order to communicate that we're showing the dropdown at the moment
+        /// It's employed to skip auto-saving, because that complicates updating the internal SerializedProperties.
+        /// Unfortunately, we can't use IMGUIDropdownVisible from the setings provider because of the early-out logic in there.
+        /// </summary>
+        internal static bool IsShowingDropdown { get; private set; }
+    }
+}
+ #endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPathEditor.cs.meta

@@ -0,0 +1,11 @@
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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPicker.cs

@@ -0,0 +1,41 @@
+#if UNITY_EDITOR || PACKAGE_DOCS_GENERATION
+using System;
+
+////REVIEW: should this be a PopupWindowContent?
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// A popup that allows picking input controls graphically.
+    /// </summary>
+    public sealed class InputControlPicker : IDisposable
+    {
+        public InputControlPicker(Mode mode, Action<string> onPick, InputControlPickerState state)
+        {
+            m_State = state ?? new InputControlPickerState();
+            m_Dropdown = new InputControlPickerDropdown(state, onPick, mode: mode);
+        }
+
+        public void Show(Rect rect)
+        {
+            m_Dropdown.Show(rect);
+        }
+
+        public void Dispose()
+        {
+            m_Dropdown?.Dispose();
+        }
+
+        public InputControlPickerState state => m_State;
+
+        private readonly InputControlPickerDropdown m_Dropdown;
+        private readonly InputControlPickerState m_State;
+
+        public enum Mode
+        {
+            PickControl,
+            PickDevice,
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPicker.cs.meta

@@ -0,0 +1,11 @@
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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPickerDropdown.cs

@@ -0,0 +1,645 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using UnityEditor;
+using UnityEngine.InputSystem.Controls;
+using UnityEngine.InputSystem.Layouts;
+using UnityEngine.InputSystem.Utilities;
+
+////TODO: have tooltips on each entry in the picker
+
+////TODO: find better way to present controls when filtering to specific devices
+
+////REVIEW: if there's only a single device in the picker, automatically go into it?
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal class InputControlPickerDropdown : AdvancedDropdown, IDisposable
+    {
+        public InputControlPickerDropdown(
+            InputControlPickerState state,
+            Action<string> onPickCallback,
+            InputControlPicker.Mode mode = InputControlPicker.Mode.PickControl)
+            : base(state.advancedDropdownState)
+        {
+            m_Gui = new InputControlPickerGUI(this);
+
+            minimumSize = new Vector2(275, 300);
+            maximumSize = new Vector2(0, 300);
+
+            m_OnPickCallback = onPickCallback;
+            m_Mode = mode;
+        }
+
+        public void SetControlPathsToMatch(string[] controlPathsToMatch)
+        {
+            m_ControlPathsToMatch = controlPathsToMatch;
+            Reload();
+        }
+
+        public void SetExpectedControlLayout(string expectedControlLayout)
+        {
+            m_ExpectedControlLayout = expectedControlLayout;
+
+            if (string.Equals(expectedControlLayout, "InputDevice", StringComparison.InvariantCultureIgnoreCase))
+                m_ExpectedControlType = typeof(InputDevice);
+            else
+                m_ExpectedControlType = !string.IsNullOrEmpty(expectedControlLayout)
+                    ? InputSystem.s_Manager.m_Layouts.GetControlTypeForLayout(new InternedString(expectedControlLayout))
+                    : null;
+
+            // If the layout is for a device, automatically switch to device
+            // picking mode.
+            if (m_ExpectedControlType != null && typeof(InputDevice).IsAssignableFrom(m_ExpectedControlType))
+                m_Mode = InputControlPicker.Mode.PickDevice;
+
+            Reload();
+        }
+
+        public void SetPickedCallback(Action<string> action)
+        {
+            m_OnPickCallback = action;
+        }
+
+        protected override void OnDestroy()
+        {
+            InputActionsEditorSettingsProvider.SetIMGUIDropdownVisible(false, false);
+            m_RebindingOperation?.Dispose();
+            m_RebindingOperation = null;
+        }
+
+        public void Dispose()
+        {
+            m_RebindingOperation?.Dispose();
+        }
+
+        protected override AdvancedDropdownItem BuildRoot()
+        {
+            var root = new AdvancedDropdownItem(string.Empty);
+
+            // Usages.
+            if (m_Mode != InputControlPicker.Mode.PickDevice)
+            {
+                var usages = BuildTreeForControlUsages();
+                if (usages.children.Any())
+                {
+                    root.AddChild(usages);
+                    root.AddSeparator();
+                }
+            }
+
+            // Devices.
+            AddItemsForDevices(root);
+
+            return root;
+        }
+
+        protected override AdvancedDropdownItem BuildCustomSearch(string searchString,
+            IEnumerable<AdvancedDropdownItem> elements)
+        {
+            if (!isListening)
+                return null;
+
+            var root = new AdvancedDropdownItem(!string.IsNullOrEmpty(m_ExpectedControlLayout)
+                ? $"Listening for {m_ExpectedControlLayout}..."
+                : "Listening for input...");
+
+            if (searchString == "\u0017")
+                return root;
+
+            var paths = searchString.Substring(1).Split('\u0017');
+            foreach (var element in elements)
+            {
+                if (element is ControlDropdownItem controlItem && paths.Any(x => controlItem.controlPathWithDevice == x))
+                    root.AddChild(element);
+            }
+
+            return root;
+        }
+
+        protected override void ItemSelected(AdvancedDropdownItem item)
+        {
+            InputActionsEditorSettingsProvider.SetIMGUIDropdownVisible(false, true);
+            var path = ((InputControlDropdownItem)item).controlPathWithDevice;
+            m_OnPickCallback(path);
+        }
+
+        private AdvancedDropdownItem BuildTreeForControlUsages(string device = "", string usage = "")
+        {
+            var usageRoot = new AdvancedDropdownItem("Usages");
+            foreach (var usageAndLayouts in EditorInputControlLayoutCache.allUsages)
+            {
+                if (usageAndLayouts.Item2.Any(LayoutMatchesExpectedControlLayoutFilter))
+                {
+                    var child = new ControlUsageDropdownItem(device, usage, usageAndLayouts.Item1);
+                    usageRoot.AddChild(child);
+                }
+            }
+            return usageRoot;
+        }
+
+        private void AddItemsForDevices(AdvancedDropdownItem parent)
+        {
+            // Add devices that are marked as generic types of devices directly to the parent.
+            // E.g. adds "Gamepad" and then underneath all the more specific types of gamepads.
+            foreach (var deviceLayout in EditorInputControlLayoutCache.allLayouts
+                     .Where(x => x.isDeviceLayout && !x.isOverride && x.isGenericTypeOfDevice && !x.hideInUI)
+                     .OrderBy(a => a.displayName))
+            {
+                AddDeviceTreeItemRecursive(deviceLayout, parent);
+            }
+
+            // We have devices that are based directly on InputDevice but are not marked as generic types
+            // of devices (e.g. Vive Lighthouses). We do not want them to clutter the list at the root so we
+            // put all of them in a group called "Other" at the end of the list.
+            var otherGroup = new AdvancedDropdownItem("Other");
+            foreach (var deviceLayout in EditorInputControlLayoutCache.allLayouts
+                     .Where(x => x.isDeviceLayout && !x.isOverride && !x.isGenericTypeOfDevice &&
+                         (x.type.BaseType == typeof(InputDevice) || x.type == typeof(InputDevice)) &&
+                         !x.hideInUI && !x.baseLayouts.Any()).OrderBy(a => a.displayName))
+            {
+                AddDeviceTreeItemRecursive(deviceLayout, otherGroup);
+            }
+
+            if (otherGroup.children.Any())
+                parent.AddChild(otherGroup);
+        }
+
+        private void AddDeviceTreeItemRecursive(InputControlLayout layout, AdvancedDropdownItem parent, bool searchable = true)
+        {
+            // Find all layouts directly based on this one (ignoring overrides).
+            var childLayouts = EditorInputControlLayoutCache.allLayouts
+                .Where(x => x.isDeviceLayout && !x.isOverride && !x.hideInUI && x.baseLayouts.Contains(layout.name)).OrderBy(x => x.displayName);
+
+            // See if the entire tree should be excluded.
+            var shouldIncludeDeviceLayout = ShouldIncludeDeviceLayout(layout);
+            var shouldIncludeAtLeastOneChildLayout = childLayouts.Any(ShouldIncludeDeviceLayout);
+
+            if (!shouldIncludeDeviceLayout && !shouldIncludeAtLeastOneChildLayout)
+                return;
+
+            // Add toplevel item for device.
+            var deviceItem = new DeviceDropdownItem(layout, searchable: searchable);
+
+            var defaultControlPickerLayout = new DefaultInputControlPickerLayout();
+
+            // Add common usage variants of the device
+            if (layout.commonUsages.Count > 0)
+            {
+                foreach (var usage in layout.commonUsages)
+                {
+                    var usageItem = new DeviceDropdownItem(layout, usage);
+
+                    // Add control usages to the device variants
+                    var deviceVariantControlUsages = BuildTreeForControlUsages(layout.name, usage);
+                    if (deviceVariantControlUsages.children.Any())
+                    {
+                        usageItem.AddChild(deviceVariantControlUsages);
+                        usageItem.AddSeparator();
+                    }
+
+                    if (m_Mode == InputControlPicker.Mode.PickControl)
+                        AddControlTreeItemsRecursive(defaultControlPickerLayout, layout, usageItem, layout.name, usage, searchable);
+                    deviceItem.AddChild(usageItem);
+                }
+                deviceItem.AddSeparator();
+            }
+
+            // Add control usages
+            var deviceControlUsages = BuildTreeForControlUsages(layout.name);
+            if (deviceControlUsages.children.Any())
+            {
+                deviceItem.AddChild(deviceControlUsages);
+                deviceItem.AddSeparator();
+            }
+
+            // Add controls.
+            if (m_Mode != InputControlPicker.Mode.PickDevice)
+            {
+                // The keyboard is special in that we want to allow binding by display name (i.e. character
+                // generated by a key) instead of only by physical key location. Also, we want to give an indication
+                // of which specific key an entry refers to by taking the current keyboard layout into account.
+                //
+                // So what we do is add an extra level to the keyboard where key's can be bound by character
+                // according to the current layout. And in the top level of the keyboard we display keys with
+                // both physical and logical names.
+                if (layout.type == typeof(Keyboard) && InputSystem.GetDevice<Keyboard>() != null)
+                {
+                    var byLocationGroup = new AdvancedDropdownItem("By Location of Key (Using US Layout)");
+                    var byCharacterGroup = new AdvancedDropdownItem("By Character Mapped to Key");
+
+                    deviceItem.AddChild(byLocationGroup);
+                    deviceItem.AddChild(byCharacterGroup);
+
+                    var keyboard = InputSystem.GetDevice<Keyboard>();
+
+                    AddCharacterKeyBindingsTo(byCharacterGroup, keyboard);
+                    AddPhysicalKeyBindingsTo(byLocationGroup, keyboard, searchable);
+
+                    // AnyKey won't appear in either group. Add it explicitly.
+                    AddControlItem(defaultControlPickerLayout, deviceItem, null,
+                        layout.FindControl(new InternedString("anyKey")).Value, layout.name, null, searchable);
+                }
+                else if (layout.type == typeof(Touchscreen))
+                {
+                    AddControlTreeItemsRecursive(new TouchscreenControlPickerLayout(), layout, deviceItem, layout.name, null, searchable);
+                }
+                else
+                {
+                    AddControlTreeItemsRecursive(defaultControlPickerLayout, layout, deviceItem, layout.name, null, searchable);
+                }
+            }
+
+            // Add child items.
+            var isFirstChild = true;
+            foreach (var childLayout in childLayouts)
+            {
+                if (!ShouldIncludeDeviceLayout(childLayout))
+                    continue;
+
+                if (isFirstChild)
+                    deviceItem.AddSeparator("More Specific " + deviceItem.name.GetPlural());
+                isFirstChild = false;
+
+                AddDeviceTreeItemRecursive(childLayout, deviceItem, searchable && !childLayout.isGenericTypeOfDevice);
+            }
+
+            // When picking devices, it must be possible to select a device that itself has more specific types
+            // of devices underneath it. However in the dropdown, such a device will be a foldout and not itself
+            // be selectable. We solve this problem by adding an entry for the device underneath the device
+            // itself (e.g. "Gamepad >> Gamepad").
+            if (m_Mode == InputControlPicker.Mode.PickDevice && deviceItem.m_Children.Count > 0)
+            {
+                var item = new DeviceDropdownItem(layout);
+                deviceItem.m_Children.Insert(0, item);
+            }
+
+            if (deviceItem.m_Children.Count > 0 || m_Mode == InputControlPicker.Mode.PickDevice)
+                parent.AddChild(deviceItem);
+        }
+
+        private void AddControlTreeItemsRecursive(IInputControlPickerLayout controlPickerLayout, InputControlLayout layout,
+            DeviceDropdownItem parent, string device, string usage, bool searchable, ControlDropdownItem parentControl = null)
+        {
+            foreach (var control in layout.controls.OrderBy(a => a.name))
+            {
+                if (control.isModifyingExistingControl)
+                    continue;
+
+                // Skip variants except the default variant and variants dictated by the layout itself.
+                if (!control.variants.IsEmpty() && control.variants != InputControlLayout.DefaultVariant
+                    && (layout.variants.IsEmpty() || !InputControlLayout.VariantsMatch(layout.variants, control.variants)))
+                {
+                    continue;
+                }
+
+                controlPickerLayout.AddControlItem(this, parent, parentControl, control, device, usage, searchable);
+            }
+
+            // Add optional controls for devices.
+            var optionalControls = EditorInputControlLayoutCache.GetOptionalControlsForLayout(layout.name);
+            if (optionalControls.Any() && layout.isDeviceLayout)
+            {
+                var optionalGroup = new AdvancedDropdownItem("Optional Controls");
+                foreach (var optionalControl in optionalControls)
+                {
+                    ////FIXME: this should list children, too
+                    ////FIXME: this should handle arrays, too
+                    if (LayoutMatchesExpectedControlLayoutFilter(optionalControl.layout))
+                    {
+                        var child = new OptionalControlDropdownItem(optionalControl, device, usage);
+                        child.icon = EditorInputControlLayoutCache.GetIconForLayout(optionalControl.layout);
+                        optionalGroup.AddChild(child);
+                    }
+                }
+
+                if (optionalGroup.children.Any())
+                {
+                    var deviceName = EditorInputControlLayoutCache.TryGetLayout(device).m_DisplayName ??
+                        ObjectNames.NicifyVariableName(device);
+                    parent.AddSeparator("Controls Present on More Specific " + deviceName.GetPlural());
+                    parent.AddChild(optionalGroup);
+                }
+            }
+        }
+
+        internal void AddControlItem(IInputControlPickerLayout controlPickerLayout,
+            DeviceDropdownItem parent, ControlDropdownItem parentControl,
+            InputControlLayout.ControlItem control, string device, string usage, bool searchable,
+            string controlNameOverride = default)
+        {
+            var controlName = controlNameOverride ?? control.name;
+
+            // If it's an array, generate a control entry for each array element.
+            for (var i = 0; i < (control.isArray ? control.arraySize : 1); ++i)
+            {
+                var name = control.isArray ? controlName + i : controlName;
+                var displayName = !string.IsNullOrEmpty(control.displayName)
+                    ? (control.isArray ? $"{control.displayName} #{i}" : control.displayName)
+                    : name;
+
+                var child = new ControlDropdownItem(parentControl, name, displayName,
+                    device, usage, searchable);
+                child.icon = EditorInputControlLayoutCache.GetIconForLayout(control.layout);
+                var controlLayout = EditorInputControlLayoutCache.TryGetLayout(control.layout);
+
+                if (LayoutMatchesExpectedControlLayoutFilter(control.layout))
+                    parent.AddChild(child);
+                else if (controlLayout.controls.Any(x => LayoutMatchesExpectedControlLayoutFilter(x.layout)))
+                {
+                    child.enabled = false;
+                    parent.AddChild(child);
+                }
+                // Add children.
+                if (controlLayout != null)
+                    AddControlTreeItemsRecursive(controlPickerLayout, controlLayout, parent, device, usage,
+                        searchable, child);
+            }
+        }
+
+        private static void AddPhysicalKeyBindingsTo(AdvancedDropdownItem parent, Keyboard keyboard, bool searchable)
+        {
+            foreach (var key in keyboard.children.OfType<KeyControl>())
+            {
+                // If the key has a display name that differs from the key name, show it in the UI.
+                var displayName = key.m_DisplayNameFromLayout;
+                var keyDisplayName = key.displayName;
+                if (keyDisplayName.All(x => x.IsPrintable()) && string.Compare(keyDisplayName, displayName,
+                    StringComparison.InvariantCultureIgnoreCase) != 0)
+                    displayName = $"{displayName} (Current Layout: {key.displayName})";
+
+                // For left/right modifier keys, prepend artificial combined version.
+                ButtonControl combinedVersion = null;
+                if (key == keyboard.leftShiftKey)
+                    combinedVersion = keyboard.shiftKey;
+                else if (key == keyboard.leftAltKey)
+                    combinedVersion = keyboard.altKey;
+                else if (key == keyboard.leftCtrlKey)
+                    combinedVersion = keyboard.ctrlKey;
+                if (combinedVersion != null)
+                    parent.AddChild(new ControlDropdownItem(null, combinedVersion.name, combinedVersion.displayName, keyboard.layout,
+                        "", searchable));
+
+                var item = new ControlDropdownItem(null, key.name, displayName,
+                    keyboard.layout, "", searchable);
+
+                parent.AddChild(item);
+            }
+        }
+
+        private static void AddCharacterKeyBindingsTo(AdvancedDropdownItem parent, Keyboard keyboard)
+        {
+            foreach (var key in keyboard.children.OfType<KeyControl>())
+            {
+                if (!key.keyCode.IsTextInputKey())
+                    continue;
+
+                // We can only bind to characters that can be printed.
+                var displayName = key.displayName;
+                if (!displayName.All(x => x.IsPrintable()))
+                    continue;
+
+                if (displayName.Contains(')'))
+                    displayName = string.Join("", displayName.Select(x => "\\" + x));
+
+                ////TODO: should be searchable; when searching, needs different display name
+                var item = new ControlDropdownItem(null, $"#({displayName})", "", keyboard.layout, "", false);
+                item.name = key.displayName;
+
+                parent.AddChild(item);
+            }
+        }
+
+        private bool LayoutMatchesExpectedControlLayoutFilter(string layout)
+        {
+            if (m_ExpectedControlType == null)
+                return true;
+
+            var layoutType = InputSystem.s_Manager.m_Layouts.GetControlTypeForLayout(new InternedString(layout));
+            return m_ExpectedControlType.IsAssignableFrom(layoutType);
+        }
+
+        private bool ShouldIncludeDeviceLayout(InputControlLayout layout)
+        {
+            if (layout.hideInUI)
+                return false;
+
+            // By default, if a device has no (usable) controls, we don't want it listed in the control picker
+            // except if we're picking devices.
+            if (!layout.controls.Any(x => LayoutMatchesExpectedControlLayoutFilter(x.layout)) && layout.controls.Any(x => true) &&
+                m_Mode != InputControlPicker.Mode.PickDevice)
+                return false;
+
+            // If we have a device filter, see if we should ignore the device.
+            if (m_ControlPathsToMatch != null && m_ControlPathsToMatch.Length > 0)
+            {
+                var matchesAnyInDeviceFilter = false;
+                foreach (var entry in m_ControlPathsToMatch)
+                {
+                    // Include the layout if it's in the inheritance hierarchy of the layout we expect (either below
+                    // or above it or, well, just right on it).
+                    var expectedLayout = InputControlPath.TryGetDeviceLayout(entry);
+                    if (!string.IsNullOrEmpty(expectedLayout) &&
+                        (expectedLayout == layout.name ||
+                         InputControlLayout.s_Layouts.IsBasedOn(layout.name, new InternedString(expectedLayout)) ||
+                         InputControlLayout.s_Layouts.IsBasedOn(new InternedString(expectedLayout), layout.name)))
+                    {
+                        matchesAnyInDeviceFilter = true;
+                        break;
+                    }
+                }
+
+                if (!matchesAnyInDeviceFilter)
+                    return false;
+            }
+
+            return true;
+        }
+
+        private void StartListening()
+        {
+            if (m_RebindingOperation == null)
+                m_RebindingOperation = new InputActionRebindingExtensions.RebindingOperation();
+
+            ////TODO: for keyboard, generate both possible paths (physical and by display name)
+
+            m_RebindingOperation.Reset();
+            m_RebindingOperation
+                .WithExpectedControlType(m_ExpectedControlLayout)
+                // Require minimum actuation of 0.15f. This is after deadzoning has been applied.
+                .WithMagnitudeHavingToBeGreaterThan(0.15f)
+                ////REVIEW: should we exclude only the system's active pointing device?
+                // With the mouse operating the UI, its cursor control is too fickle a thing to
+                // bind to. Ignore mouse position and delta and clicks.
+                // NOTE: We go for all types of pointers here, not just mice.
+                .WithControlsExcluding("<Pointer>/position")
+                .WithControlsExcluding("<Pointer>/delta")
+                .WithControlsExcluding("<Pointer>/press")
+                .WithControlsExcluding("<Pointer>/clickCount")
+                .WithControlsExcluding("<Pointer>/{PrimaryAction}")
+                .WithControlsExcluding("<Mouse>/scroll")
+                .OnPotentialMatch(
+                    operation =>
+                    {
+                        // We never really complete the pick but keep listening for as long as the "Interactive"
+                        // button is toggled on.
+
+                        Repaint();
+                    })
+                .OnCancel(
+                    operation =>
+                    {
+                        Repaint();
+                    })
+                .OnApplyBinding(
+                    (operation, newPath) =>
+                    {
+                        // This is never invoked (because we don't complete the pick) but we need it nevertheless
+                        // as RebindingOperation requires the callback if we don't supply an action to apply the binding to.
+                    });
+
+            // If we have control paths to match, pass them on.
+            if (m_ControlPathsToMatch.LengthSafe() > 0)
+                m_ControlPathsToMatch.Select(x => m_RebindingOperation.WithControlsHavingToMatchPath(x));
+
+            m_RebindingOperation.Start();
+        }
+
+        private void StopListening()
+        {
+            m_RebindingOperation?.Cancel();
+        }
+
+        // This differs from RebindingOperation.GeneratePathForControl in that it cycles through all
+        // layouts in the inheritance chain and generates a path for each one that contains the given control.
+        private static IEnumerable<string> GeneratePossiblePathsForControl(InputControl control)
+        {
+            var builder = new StringBuilder();
+            var deviceLayoutName = control.device.m_Layout;
+            do
+            {
+                // Skip layout if it is supposed to be hidden in the UI.
+                var layout = EditorInputControlLayoutCache.TryGetLayout(deviceLayoutName);
+                if (layout.hideInUI)
+                    continue;
+
+                builder.Length = 0;
+                yield return control.BuildPath(deviceLayoutName, builder);
+            }
+            while (InputControlLayout.s_Layouts.baseLayoutTable.TryGetValue(deviceLayoutName, out deviceLayoutName));
+        }
+
+        private Action<string> m_OnPickCallback;
+        private InputControlPicker.Mode m_Mode;
+        private string[] m_ControlPathsToMatch;
+        private string m_ExpectedControlLayout;
+        private Type m_ExpectedControlType;
+        private InputActionRebindingExtensions.RebindingOperation m_RebindingOperation;
+
+        private bool isListening => m_RebindingOperation != null && m_RebindingOperation.started;
+
+        private class InputControlPickerGUI : AdvancedDropdownGUI
+        {
+            private readonly InputControlPickerDropdown m_Owner;
+
+            public InputControlPickerGUI(InputControlPickerDropdown owner)
+            {
+                m_Owner = owner;
+            }
+
+            internal override void BeginDraw(EditorWindow window)
+            {
+                if (Event.current.isKey && Event.current.keyCode == KeyCode.Escape)
+                {
+                    window.Close();
+                    return;
+                }
+
+                if (m_Owner.isListening)
+                {
+                    // Eat key events to suppress the editor from passing them to the OS
+                    // (causing beeps or menu commands being triggered).
+                    if (Event.current.isKey)
+                        Event.current.Use();
+                }
+            }
+
+            internal override string DrawSearchFieldControl(string searchString)
+            {
+                using (new EditorGUILayout.HorizontalScope())
+                {
+                    var isListening = false;
+
+                    // When picking controls, have a "Listen" button that allows listening for input.
+                    if (m_Owner.m_Mode == InputControlPicker.Mode.PickControl)
+                    {
+                        using (new EditorGUILayout.VerticalScope(GUILayout.MaxWidth(50)))
+                        {
+                            GUILayout.Space(4);
+                            var isListeningOld = m_Owner.isListening;
+                            var isListeningNew = GUILayout.Toggle(isListeningOld, "Listen",
+                                EditorStyles.miniButton, GUILayout.MaxWidth(50));
+
+                            if (isListeningOld != isListeningNew)
+                            {
+                                if (isListeningNew)
+                                {
+                                    m_Owner.StartListening();
+                                }
+                                else
+                                {
+                                    m_Owner.StopListening();
+                                    searchString = string.Empty;
+                                }
+                            }
+
+                            isListening = isListeningNew;
+                        }
+                    }
+
+                    ////FIXME: the search box doesn't clear out when listening; no idea why the new string isn't taking effect
+                    EditorGUI.BeginDisabledGroup(isListening);
+                    var newSearchString = base.DrawSearchFieldControl(isListening ? string.Empty : searchString);
+                    EditorGUI.EndDisabledGroup();
+
+                    if (isListening)
+                    {
+                        var rebind = m_Owner.m_RebindingOperation;
+                        return "\u0017" + string.Join("\u0017",
+                            rebind.candidates.SelectMany(x => GeneratePossiblePathsForControl(x).Reverse()));
+                    }
+
+                    return newSearchString;
+                }
+            }
+
+            internal override void DrawItem(AdvancedDropdownItem item, string name, Texture2D icon, bool enabled,
+                bool drawArrow, bool selected, bool hasSearch, bool richText = false)
+            {
+                if (hasSearch && item is InputControlDropdownItem viewItem)
+                    name = viewItem.searchableName;
+
+                base.DrawItem(item, name, icon, enabled, drawArrow, selected, hasSearch);
+            }
+
+            internal override void DrawFooter(AdvancedDropdownItem selectedItem)
+            {
+                //dun work because there is no selection
+                if (selectedItem is ControlDropdownItem controlItem)
+                {
+                    var content = new GUIContent(controlItem.controlPath);
+                    var rect = GUILayoutUtility.GetRect(content, headerStyle, GUILayout.ExpandWidth(true));
+                    EditorGUI.TextField(rect, controlItem.controlPath, headerStyle);
+                }
+            }
+        }
+
+        private static class Styles
+        {
+            public static readonly GUIStyle waitingForInputLabel = new GUIStyle("WhiteBoldLabel").WithFontSize(22);
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPickerDropdown.cs.meta

@@ -0,0 +1,11 @@
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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPickerState.cs

@@ -0,0 +1,27 @@
+#if UNITY_EDITOR || PACKAGE_DOCS_GENERATION
+using System;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    /// <summary>
+    /// Persistent state for <see cref="InputControlPathEditor"/>.
+    /// </summary>
+    /// <remarks>
+    /// This class encapsulates the viewing state for an input control picker.
+    /// </remarks>
+    [Serializable]
+    public class InputControlPickerState
+    {
+        internal AdvancedDropdownState advancedDropdownState => m_AdvancedDropdownState;
+
+        internal bool manualPathEditMode
+        {
+            get => m_ManualPathEditMode;
+            set => m_ManualPathEditMode = value;
+        }
+
+        [SerializeField] private AdvancedDropdownState m_AdvancedDropdownState = new AdvancedDropdownState();
+        [SerializeField] private bool m_ManualPathEditMode;
+    }
+}
+#endif

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/InputControlPickerState.cs.meta

@@ -0,0 +1,11 @@
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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/Layouts.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/Layouts/DefaultInputControlPickerLayout.cs

@@ -0,0 +1,16 @@
+#if UNITY_EDITOR
+using UnityEngine.InputSystem.Layouts;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal class DefaultInputControlPickerLayout : IInputControlPickerLayout
+    {
+        public void AddControlItem(InputControlPickerDropdown dropdown, DeviceDropdownItem parent,
+            ControlDropdownItem parentControl,
+            InputControlLayout.ControlItem control, string device, string usage, bool searchable)
+        {
+            dropdown.AddControlItem(this, parent, parentControl, control, device, usage, searchable);
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/Layouts/DefaultInputControlPickerLayout.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/Layouts/TouchscreenControlPickerLayout.cs

@@ -0,0 +1,36 @@
+#if UNITY_EDITOR
+using UnityEngine.InputSystem.Layouts;
+using UnityEngine.InputSystem.Utilities;
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal class TouchscreenControlPickerLayout : IInputControlPickerLayout
+    {
+        public void AddControlItem(InputControlPickerDropdown dropdown, DeviceDropdownItem parent, ControlDropdownItem parentControl,
+            InputControlLayout.ControlItem control, string device, string usage, bool searchable)
+        {
+            // for the Press control, show two variants, one for single touch presses, and another for multi-touch presses
+            if (control.displayName == "Press")
+            {
+                dropdown.AddControlItem(this, parent, parentControl, new InputControlLayout.ControlItem
+                {
+                    name = new InternedString("Press"),
+                    displayName = new InternedString("Press (Single touch)"),
+                    layout = control.layout
+                }, device, usage, searchable);
+
+                dropdown.AddControlItem(this, parent, parentControl, new InputControlLayout.ControlItem
+                {
+                    name = new InternedString("Press"),
+                    displayName = new InternedString("Press (Multi-touch)"),
+                    layout = control.layout
+                }, device, usage, searchable, "touch*/Press");
+            }
+            else
+            {
+                dropdown.AddControlItem(this, parent, parentControl, control, device, usage, searchable);
+            }
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/ControlPicker/Layouts/TouchscreenControlPickerLayout.cs.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/Debugger.meta

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Packages/com.unity.inputsystem/InputSystem/Editor/Debugger/InputActionDebuggerWindow.cs

@@ -0,0 +1,62 @@
+#if UNITY_EDITOR
+using System;
+using System.Collections.Generic;
+using UnityEditor;
+
+////TODO: survive domain reload properly
+
+namespace UnityEngine.InputSystem.Editor
+{
+    internal class InputActionDebuggerWindow : EditorWindow
+    {
+        [NonSerialized] private InputAction m_Action = null;
+
+        public static void CreateOrShowExisting(InputAction action)
+        {
+            if (action == null)
+                throw new System.ArgumentNullException(nameof(action));
+
+            // See if we have an existing window for the action and if so pop it in front.
+            if (s_OpenDebuggerWindows != null)
+            {
+                for (var i = 0; i < s_OpenDebuggerWindows.Count; ++i)
+                {
+                    var existingWindow = s_OpenDebuggerWindows[i];
+                    if (ReferenceEquals(existingWindow.m_Action, action))
+                    {
+                        existingWindow.Show();
+                        existingWindow.Focus();
+                        return;
+                    }
+                }
+            }
+
+            // No, so create a new one.
+            var window = CreateInstance<InputActionDebuggerWindow>();
+            window.Show();
+            window.titleContent = new GUIContent(action.name);
+            window.AddToList();
+        }
+
+        public void OnGUI()
+        {
+        }
+
+        private static List<InputActionDebuggerWindow> s_OpenDebuggerWindows;
+
+        private void AddToList()
+        {
+            if (s_OpenDebuggerWindows == null)
+                s_OpenDebuggerWindows = new List<InputActionDebuggerWindow>();
+            if (!s_OpenDebuggerWindows.Contains(this))
+                s_OpenDebuggerWindows.Add(this);
+        }
+
+        private void RemoveFromList()
+        {
+            if (s_OpenDebuggerWindows != null)
+                s_OpenDebuggerWindows.Remove(this);
+        }
+    }
+}
+#endif // UNITY_EDITOR

Packages/com.unity.inputsystem/InputSystem/Editor/Debugger/InputActionDebuggerWindow.cs.meta

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