SearchProvider

描述

SearchProvider manages search for specific types of items and manages all fields of a SearchItem such as thumbnails, descriptions, subfilters.

A first example that allows to search for specific prefabs and insert them in the scene.

using System.Collections.Generic;
using UnityEditor;
using UnityEditor.Search;
using UnityEngine;

static class Example_SearchProvider
{
    internal static string id = "example_tree";
    internal static string name = "example_Tree";

    [SearchItemProvider]
    internal static SearchProvider CreateProvider()
    {
        return new SearchProvider(id, name)
        {
            filterId = "tree:",
            priority = 99999, // put example provider at a low priority
            fetchItems = (context, items, provider) =>
            {
                // That provider searches for tree prefabs in the project
                var results = AssetDatabase.FindAssets("t:Prefab tree" + context.searchQuery);
                foreach (var guid in results)
                {
                    items.Add(provider.CreateItem(context, AssetDatabase.GUIDToAssetPath(guid), null, null, null, null));
                }
                return null;
            },
            #pragma warning disable UNT0008 // Null propagation on Unity objects
            // Use fetch to load the asset asynchronously on display
            fetchThumbnail = (item, context) => AssetDatabase.GetCachedIcon(item.id) as Texture2D,
            fetchPreview = (item, context, size, options) => AssetDatabase.GetCachedIcon(item.id) as Texture2D,
            fetchLabel = (item, context) => AssetDatabase.LoadMainAssetAtPath(item.id)?.name,
            fetchDescription = (item, context) => AssetDatabase.LoadMainAssetAtPath(item.id)?.name,
            toObject = (item, type) => AssetDatabase.LoadMainAssetAtPath(item.id),
            #pragma warning restore UNT0008 // Null propagation on Unity objects
            // Shows handled actions in the preview inspector
            // Shows inspector view in the preview inspector (uses toObject)
            showDetailsOptions = ShowDetailsOptions.Inspector | ShowDetailsOptions.Actions,
            trackSelection = (item, context) =>
            {
                var obj = AssetDatabase.LoadMainAssetAtPath(item.id);
                if (obj != null)
                    EditorGUIUtility.PingObject(obj.GetInstanceID());
            },
            startDrag = (item, context) =>
            {
                var obj = AssetDatabase.LoadMainAssetAtPath(item.id);
                if (obj != null)
                {
                    DragAndDrop.PrepareStartDrag();
                    DragAndDrop.objectReferences = new Object[] { obj };
                    DragAndDrop.StartDrag(item.label);
                }
            }
        };
    }

    [SearchActionsProvider]
    internal static IEnumerable<SearchAction> ActionHandlers()
    {
        return new[]
        {
            new SearchAction(id, "Insert tree", null, "Insert a single tree in scene")
            {
                handler = (item) =>
                {
                    InsertPrefab(item.id);
                }
            },
            new SearchAction(id, "Insert forest", null, "Insert a forest in scene")
            {
                handler = (item) =>
                {
                    for (int i = 0; i < 5; i++)
                    {
                        for (int j = 0; j < 5; j++)
                        {
                            var instance = InsertPrefab(item.id);
                            if (instance != null)
                                instance.transform.Translate(i, 0, j);
                        }
                    }
                }
            }
        };
    }

    private static GameObject InsertPrefab(string id)
    {
        return (GameObject)PrefabUtility.InstantiatePrefab(AssetDatabase.LoadMainAssetAtPath(AssetDatabase.GUIDToAssetPath(id)), Selection.activeGameObject != null ? Selection.activeGameObject.transform : null);
    }

    public static void Init()
    {
        for (int i = 0; i < 5; ++i)
        {
            var go = new GameObject();
            PrefabUtility.SaveAsPrefabAsset(go, "Assets/tree" + i + ".prefab");
            Object.DestroyImmediate(go);
        }

        SearchService.ShowContextual(id);
    }
}

Another example that allows to search for lights and modify them. This provider uses another provider to get the lights.

using System;
using System.Collections.Generic;
using UnityEditor;
using UnityEditor.Search;
using UnityEngine;

static class SearchProviderLights
{
    static SearchProvider sceneProvider = null;
    static Texture2D lightTexture = EditorGUIUtility.FindTexture("Lighting");

    [SearchItemProvider]
    internal static SearchProvider CreateProvider()
    {
        return new SearchProvider("example_lights", "example_Lights")
        {
            filterId = "z:",
            priority = 99999, // put example provider at a low priority
            fetchItems = (context, items, provider) => FetchItems(context, provider),
            showDetailsOptions = ShowDetailsOptions.Inspector,
            toObject = ToObject,
            onEnable = OnEnable,
            onDisable = OnDisable,
            // This provider can be used in the scene and hierarchy contextual search
            isEnabledForContextualSearch = () =>
                IsFocusedWindowTypeName("SceneView") ||
                IsFocusedWindowTypeName("SceneHierarchyWindow")
        };
    }

    private static IEnumerable<SearchItem> FetchItems(SearchContext context, SearchProvider provider)
    {
        if (string.IsNullOrEmpty(context.searchQuery) || sceneProvider == null)
            yield break;

        using (var innerContext = SearchService.CreateContext(sceneProvider, "t:light " + context.searchQuery))
        using (var results = SearchService.Request(innerContext))
        {
            foreach (var r in results)
            {
                if (r != null)
                {
                    yield return provider.CreateItem(context, r.id,
                        r.GetLabel(innerContext, true), r.GetDescription(innerContext, true),
                        lightTexture, null);
                }
                else
                {
                    // ***IMPORTANT***: Make sure to yield so you do not block the main thread waiting for results.
                    yield return null;
                }
            }
        }
    }

    private static void OnEnable()
    {
        sceneProvider = SearchService.GetProvider("scene");
    }

    private static void OnDisable()
    {
        sceneProvider = null;
    }

    private static UnityEngine.Object ToObject(SearchItem item, Type type)
    {
        if (!(EditorUtility.InstanceIDToObject(int.Parse(item.id)) is GameObject light))
            return null;

        return light.GetComponent<Light>();
    }

    private static bool IsFocusedWindowTypeName(string focusWindowName)
    {
        return EditorWindow.focusedWindow != null && EditorWindow.focusedWindow.GetType().ToString().EndsWith("." + focusWindowName);
    }

    [MenuItem("Examples/SearchProvider/Show lights")]
    public static void ShowLights()
    {
        // Search for directional lights (lights with "directional" in their name)
        SearchService.ShowWindow(SearchService.CreateContext("z:directional"));
    }
}

变量

构造函数

公共函数