QueryEngine<T0>.SetSearchWordMatcher

Parameters

Description

Set the search word matching function to be used instead of the default one. Set to null to use the default.

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

static class Example_QueryEngine_SetSearchWordMatcher
{
    static List<MyObjectType> s_Data;

    [MenuItem("Examples/QueryEngine/SetSearchWordMatcher")]
    public static void RunExample()
    {
        // Set up the query engine
        var queryEngine = new QueryEngine<MyObjectType>();
        queryEngine.AddFilter("id", myObj => myObj.id);
        queryEngine.SetSearchDataCallback(myObj => new[] { myObj.id.ToString(), myObj.name });

        // Set a lowercase word matching function
        queryEngine.SetSearchWordMatcher((searchWord, isExact, comparisonOption, searchData) =>
        {
            var searchWordLower = searchWord.ToLowerInvariant();
            var searchDataLower = searchData.ToLowerInvariant();
            if (isExact)
                return searchDataLower.Equals(searchWordLower, StringComparison.Ordinal);
            return searchDataLower.IndexOf(searchWordLower, StringComparison.Ordinal) >= 0;
        });

        s_Data = new List<MyObjectType>()
        {
            new MyObjectType { id = 0, name = "Test with lower", position = new Vector2(0, 0), active = false },
            new MyObjectType { id = 1, name = "Test With Upper", position = new Vector2(0, 1), active = true }
        };

        // Find all items that have the word "with" (lowercase and uppercase, because of our word matcher)
        var query = queryEngine.ParseQuery("with");
        var filteredData = query.Apply(s_Data).ToList();
        Debug.Assert(filteredData.Count == 2, $"There should be 2 items in the filtered list but found {filteredData.Count} items.");
        Debug.Assert(filteredData.Contains(s_Data[0]), "First item should be in the list.");
        Debug.Assert(filteredData.Contains(s_Data[1]), "Second item should be in the list.");
    }

    class MyObjectType
    {
        public int id { get; set; }
        public string name { get; set; } = string.Empty;
        public Vector2 position { get; set; } = Vector2.zero;
        public bool active { get; set; }

        public override string ToString()
        {
            return $"({id}, {name}, ({position.x}, {position.y}), {active})";
        }
    }
}