SearchProvider

说明

SearchProvider 管理特定类型项的搜索并管理 SearchItem 的所有字段，例如缩略图、描述、子筛选器。

第一个示例允许搜索特定预制并将其插入场景中。

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

static class TreeSearchProvider
{
    internal static string id = "example_tree";

    [SearchItemProvider]
    internal static SearchProvider CreateProvider()
    {
        return new SearchProvider("example_tree", "Trees")
        {
            filterId = "tree:",
            priority = 99999, // Put example provider at a low priority
            showDetailsOptions = ShowDetailsOptions.Inspector | ShowDetailsOptions.Actions,
            fetchItems = (context, items, provider) => FetchItems(context, provider),
            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),
            trackSelection = TrackSelection,
            startDrag = StartDrag
        };
    }

    private static IEnumerable<SearchItem> FetchItems(SearchContext context, SearchProvider provider)
    {
        if (context.empty)
            yield break;

        // Yield items asynchronously which is the recommended way.
        foreach (var guid in AssetDatabase.FindAssets("t:Prefab tree " + context.searchQuery))
            yield return provider.CreateItem(context, AssetDatabase.GUIDToAssetPath(guid), null, null, null, null);
    }

    private static void TrackSelection(SearchItem searchItem, SearchContext searchContext)
    {
        EditorGUIUtility.PingObject(AssetDatabase.LoadMainAssetAtPath(searchItem.id));
    }

    private static void StartDrag(SearchItem item, SearchContext context)
    {
        if (context.selection.Count > 1)
        {
            var selectedObjects = context.selection.Select(i => AssetDatabase.LoadMainAssetAtPath(i.id));
            var paths = context.selection.Select(i => i.id).ToArray();
            StartDrag(selectedObjects.ToArray(), paths, item.GetLabel(context, true));
        }
        else
            StartDrag(new[] { AssetDatabase.LoadMainAssetAtPath(item.id) }, new[] { item.id }, item.GetLabel(context, true));
    }

    public static void StartDrag(UnityEngine.Object[] objects, string[] paths, string label = null)
    {
        if (paths == null || paths.Length == 0)
            return;
        DragAndDrop.PrepareStartDrag();
        DragAndDrop.objectReferences = objects;
        DragAndDrop.paths = paths;
        DragAndDrop.StartDrag(label);
    }


    [SearchActionsProvider]
    internal static IEnumerable<SearchAction> ActionHandlers()
    {
        yield return new SearchAction(id, "Insert tree", null, "Insert a single tree in scene", (SearchItem item) => InsertPrefab(item.id));
    }

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

另一个示例允许搜索灯光并修改灯光。此提供程序使用另一个提供程序来获取灯光。

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

static class LightsSearchProvider
{
    [SearchItemProvider]
    internal static SearchProvider CreateProvider()
    {
        return new SearchProvider("example_lights", "Lights")
        {
            filterId = "z:",
            priority = 99999, // Put example provider at a low priority
            showDetailsOptions = ShowDetailsOptions.Inspector,
            fetchItems = (context, items, provider) => FetchItems(context, provider),
            toObject = (item, type) => item.data as Light,
            onEnable = () => { /*Cache some data in here*/ },
            onDisable = () => { /*Clear the cache*/ },

            // This provider can be used in the scene view contextually.
            isEnabledForContextualSearch = () => IsFocusedWindowTypeName("SceneView")
        };
    }

    static IEnumerable<SearchItem> FetchItems(SearchContext context, SearchProvider provider)
    {
        if (context.empty)
            yield break;

        var sceneProvider = SearchService.GetProvider("scene");
        using (var sceneQuery = SearchService.CreateContext(sceneProvider, $"t:light {context.searchQuery}"))
        using (var results = SearchService.Request(sceneQuery))
        {
            var lightIcon = EditorGUIUtility.FindTexture("Lighting");
            foreach (var r in results)
            {
                if (r == null)
                {
                    // ***IMPORTANT***: Make sure to yield so you do not block the main thread waiting for results.
                    yield return null;
                }
                else
                {
                    yield return provider.CreateItem(context, r.id,
                        r.GetLabel(sceneQuery, true), r.GetDescription(sceneQuery, true),
                        lightIcon, r.ToObject<GameObject>().GetComponent<Light>());
                }
            }
        }
    }

    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"));
    }
}

属性

构造函数

公共方法