// Unity C# reference source

// Copyright (c) Unity Technologies. For terms of use, see

// https://unity3d.com/legal/licenses/Unity_Reference_Only_License

using System;

using System.Collections.Generic;

using System.Linq;

using UnityEditor.Profiling;

using UnityEngine;

using Attribute = System.Attribute;

using Object = UnityEngine.Object;

namespace UnityEditor.SearchService

{

public enum SearchEngineScope

{

Scene,

Project,

ObjectSelector

}

public interface ISearchContext

{

Guid guid { get; }

SearchEngineScope engineScope { get; }

IEnumerable<Type> requiredTypes { get; }

IEnumerable<string> requiredTypeNames { get; }

}

public interface ISearchEngineBase

{

string name { get; }

void BeginSession(ISearchContext context);

void EndSession(ISearchContext context);

void BeginSearch(ISearchContext context, string query);

void EndSearch(ISearchContext context);

}

public interface ISearchEngine<T> : ISearchEngineBase

{

IEnumerable<T> Search(ISearchContext context, string query, Action<IEnumerable<T>> asyncItemsReceived);

}

public interface IFilterEngine<in T> : ISearchEngineBase

{

bool Filter(ISearchContext context, string query, T objectToFilter);

}

public interface ISelectorEngine : ISearchEngineBase

{

bool SelectObject(ISearchContext context, Action<Object, bool> onObjectSelectorClosed, Action<Object> onObjectSelectedUpdated);

void SetSearchFilter(ISearchContext context, string searchFilter);

}

class SearchSessionHandler

{

SearchEngineScope m_EngineScope;

bool m_WasSearching;

ISearchApi m_Api;

public ISearchContext context { get; private set; }

public SearchSessionHandler(SearchEngineScope engineScope)

{

m_EngineScope = engineScope;

Init();

}

void Init()

{

var index = SearchService.searchApis.FindIndex(api => api.engineScope == m_EngineScope);

if (index >= 0)

{

m_Api = SearchService.searchApis[index];

m_Api.activeEngineChanged += OnActiveEngineChanged;

}

}

void OnActiveEngineChanged(string newSearchEngineName)

{

EndSession();

}

public void BeginSession(Func<ISearchContext> searchContextCreator)

{

if (m_WasSearching)

return;

// Do a lazy initialize if the apis were not available during creation

if (m_Api == null)

{

Init();

if (m_Api == null)

throw new NullReferenceException("SearchService Apis were not initialized properly.");

}

context = searchContextCreator();

m_WasSearching = true;

m_Api?.BeginSession(context);

}

public void EndSession()

{

if (!m_WasSearching)

return;

m_WasSearching = false;

m_Api?.EndSession(context);

context = null;

}

public void BeginSearch(string query)

{

m_Api?.BeginSearch(query, context);

}

public void EndSearch()

{

m_Api?.EndSearch(context);

}

}

interface ISearchApi

{

SearchEngineScope engineScope { get; }

string displayName { get; }

IEnumerable<ISearchEngineBase> engines { get; }

string activeSearchEngineName { get; }

ISearchEngineBase GetActiveSearchEngine();

void SetActiveSearchEngine(string searchEngineName);

void RegisterEngine(ISearchEngineBase engine);

void UnregisterEngine(ISearchEngineBase engine);

bool HasEngineOverride();

void BeginSession(ISearchContext context);

void EndSession(ISearchContext context);

void BeginSearch(string query, ISearchContext context);

void EndSearch(ISearchContext context);

ISearchEngineBase GetDefaultEngine();

event Action<string> activeEngineChanged;

}

static class SearchService

{

public const string keyPrefix = "searchservice";

public const string activeSearchEnginesPrefKey = keyPrefix + ".activeengines.";

public static List<ISearchApi> searchApis = new List<ISearchApi>();

}

class SearchApiBaseImp<TAttribute, TEngine> : ISearchApi

where TAttribute : Attribute

where TEngine : class, ISearchEngineBase

{

int m_SearchPerformanceTrackerHandle;

public SearchEngineScope engineScope { get; }

public string displayName { get; }

List<TEngine> engines { get; } = new List<TEngine>();

IEnumerable<ISearchEngineBase> ISearchApi.engines => engines.Cast<ISearchEngineBase>();

public string activeSearchEngineName { get; private set; }

TEngine m_ActiveSearchEngine;

public TEngine activeSearchEngine

{

get

{

if (m_ActiveSearchEngine == null)

m_ActiveSearchEngine = GetActiveSearchEngine();

return m_ActiveSearchEngine;

}

private set => m_ActiveSearchEngine = value;

}

public event Action<string> activeEngineChanged;

public SearchApiBaseImp(SearchEngineScope engineScope, string displayName)

{

this.engineScope = engineScope;

this.displayName = displayName ?? throw new ArgumentNullException(nameof(displayName));

RegisterAllEngines();

LoadActiveSearchEngine();

SearchService.searchApis.Add(this);

}

public TEngine GetActiveSearchEngine()

{

if (engines.Count == 0)

return null;

var actualActiveEngineName = string.IsNullOrEmpty(activeSearchEngineName) ? GetDefaultEngine().name : activeSearchEngineName;

var activeEngineIndex = engines.FindIndex(engine => engine.name == actualActiveEngineName);

if (activeEngineIndex < 0)

{

var defaultEngine = GetDefaultEngine() ?? engines.First();

SetActiveSearchEngine(defaultEngine.name);

return defaultEngine;

}

return engines[activeEngineIndex];

}

ISearchEngineBase ISearchApi.GetActiveSearchEngine()

{

return GetActiveSearchEngine();

}

public TEngine GetDefaultEngine()

{

if (engines.Count == 0)

return null;

var index = engines.FindIndex(engine => engine is DefaultSearchEngineBase);

if (index < 0)

return null;

return engines[index];

}

ISearchEngineBase ISearchApi.GetDefaultEngine()

{

return GetDefaultEngine();

}

public void SetActiveSearchEngine(string searchEngineName)

{

activeEngineChanged?.Invoke(searchEngineName);

activeSearchEngineName = searchEngineName;

EditorPrefs.SetString(SearchService.activeSearchEnginesPrefKey + engineScope, searchEngineName);

activeSearchEngine = null;

}

void ISearchApi.SetActiveSearchEngine(string searchEngineName)

{

SetActiveSearchEngine(searchEngineName);

}

public bool HasEngineOverride()

{

return !(activeSearchEngine is DefaultSearchEngineBase);

}

public void BeginSession(ISearchContext context)

{

try

{

activeSearchEngine.BeginSession(context);

}

catch (Exception ex)

{

HandleUserException(ex);

}

}

public void EndSession(ISearchContext context)

{

try

{

activeSearchEngine.EndSession(context);

}

catch (Exception ex)

{

HandleUserException(ex);

}

}

public void BeginSearch(string query, ISearchContext context)

{

m_SearchPerformanceTrackerHandle = EditorPerformanceTracker.StartTracker($"Search Engine {activeSearchEngineName} ({displayName})");

try

{

activeSearchEngine.BeginSearch(context, query);

}

catch (Exception ex)

{

HandleUserException(ex);

}

}

public void EndSearch(ISearchContext context)

{

try

{

activeSearchEngine.EndSearch(context);

}

catch (Exception ex)

{

HandleUserException(ex);

}

if (EditorPerformanceTracker.IsTrackerActive(m_SearchPerformanceTrackerHandle))

EditorPerformanceTracker.StopTracker(m_SearchPerformanceTrackerHandle);

}

void LoadActiveSearchEngine()

{

activeSearchEngineName = EditorPrefs.GetString(SearchService.activeSearchEnginesPrefKey + engineScope, GetDefaultEngine().name);

}

public void RegisterEngine(TEngine engine)

{

if (engine != null && engines.FindIndex(e => e.name == engine.name) < 0)

engines.Add(engine);

}

public void UnregisterEngine(TEngine engine)

{

if (engine == null)

return;

var index = engines.FindIndex(e => e.name == engine.name);

if (index >= 0)

engines.RemoveAt(index);

}

void ISearchApi.RegisterEngine(ISearchEngineBase engine)

{

RegisterEngine(engine as TEngine);

}

void ISearchApi.UnregisterEngine(ISearchEngineBase engine)

{

UnregisterEngine(engine as TEngine);

}

void RegisterAllEngines()

{

var types = TypeCache.GetTypesWithAttribute<TAttribute>();

var instantiatedEngines = types.Select(type => Activator.CreateInstance(type));

foreach (var instantiatedEngine in instantiatedEngines)

{

if (instantiatedEngine is TEngine typedEngine)

{

RegisterEngine(typedEngine);

}

else

{

Debug.LogFormat(LogType.Warning, LogOption.NoStacktrace, null,

$"Trying to register a search engine with the attribute {typeof(TAttribute)} but it does not implement the interface {typeof(TEngine)}.");

}

}

}

public void HandleUserException(Exception ex)

{

if (activeSearchEngine is DefaultSearchEngineBase)

throw ex;

Debug.LogFormat(LogType.Error, LogOption.None, null, $"Exception caught with search engine ({displayName}){activeSearchEngine.name}:\n{ex}");

Debug.LogFormat(LogType.Error, LogOption.None, null, $"Setting {GetDefaultEngine().name} engine as active.");

SetActiveSearchEngine(GetDefaultEngine().name);

}

}

}