Search delay

Flow.Launcher.Infrastructure/UserSettings/Settings.cs

@@ -46,6 +46,8 @@ public string Language
         public string TimeFormat { get; set; } = "hh:mm tt";
         public string DateFormat { get; set; } = "MM'/'dd ddd";
         public bool FirstLaunch { get; set; } = true;
+
+        public int SearchDelay { get; set; } = 50;
 
         public double SettingWindowWidth { get; set; } = 1000;
         public double SettingWindowHeight { get; set; } = 700;

Flow.Launcher.Plugin/PluginMetadata.cs

@@ -8,16 +8,51 @@ namespace Flow.Launcher.Plugin
     public class PluginMetadata : BaseModel
     {
         private string _pluginDirectory;
+        /// <summary>
+        /// Unique ID of the plugin
+        /// </summary>
         public string ID { get; set; }
+        /// <summary>
+        /// Name of the plugin
+        /// </summary>
         public string Name { get; set; }
+        /// <summary>
+        /// Author of the plugin
+        /// </summary>
         public string Author { get; set; }
+        /// <summary>
+        /// Plugin Version
+        /// </summary>
         public string Version { get; set; }
+        /// <summary>
+        /// Programming Language of the plugin
+        /// </summary>
         public string Language { get; set; }
+        /// <summary>
+        /// Description of the plugin
+        /// </summary>
         public string Description { get; set; }
+        /// <summary>
+        /// Website of the plugin
+        /// </summary>
         public string Website { get; set; }
+        /// <summary>
+        /// Whether the plugin is enabled
+        /// </summary>
         public bool Disabled { get; set; }
+        /// <summary>
+        /// Executable file path of the plugin
+        /// </summary>
         public string ExecuteFilePath { get; private set;}
 
+        /// <summary>
+        /// Plugin Specified Search Delay
+        /// </summary>
+        public int? SearchDelay { get; set; } = null;
+
+        /// <summary>
+        /// Executable file Name of the plugin
+        /// </summary>
         public string ExecuteFileName { get; set; }
 
         public string PluginDirectory
@@ -31,17 +66,33 @@ internal set
             }
         }
 
+        /// <summary>
+        /// Action keyword of the plugin (Obsolete)
+        /// </summary>
         public string ActionKeyword { get; set; }
 
+        /// <summary>
+        /// Action keywords of the plugin
+        /// </summary>
         public List<string> ActionKeywords { get; set; }
 
+        /// <summary>
+        /// Icon path of the plugin
+        /// </summary>
         public string IcoPath { get; set;}
 
+        /// <summary>
+        /// Metadata ToString
+        /// </summary>
+        /// <returns>Full Name of Plugin</returns>
         public override string ToString()
         {
             return Name;
         }
 
+        /// <summary>
+        /// Plugin Priority
+        /// </summary>
         [JsonIgnore]
         public int Priority { get; set; }
 
@@ -50,8 +101,14 @@ public override string ToString()
         /// </summary>
         [JsonIgnore]
         public long InitTime { get; set; }
+        /// <summary>
+        /// Plugin Average Query Time (Statistics)
+        /// </summary>
         [JsonIgnore]
         public long AvgQueryTime { get; set; }
+        /// <summary>
+        /// Plugin Query Count (Statistics)
+        /// </summary>
         [JsonIgnore]
         public int QueryCount { get; set; }
     }

Flow.Launcher/Languages/en.xaml

@@ -61,12 +61,14 @@
     <system:String x:Key="hideOnStartup">Hide Flow Launcher on startup</system:String>
     <system:String x:Key="hideNotifyIcon">Hide tray icon</system:String>
     <system:String x:Key="hideNotifyIconToolTip">When the icon is hidden from the tray, the Settings menu can be opened by right-clicking on the search window.</system:String>
+    <system:String x:Key="querySearchDelay">Search Delay</system:String>
+    <system:String x:Key="querySearchDelayToolTip">Sets the speed at which search results appear when typing is stopped. Default is 50ms.</system:String>
     <system:String x:Key="querySearchPrecision">Query Search Precision</system:String>
     <system:String x:Key="querySearchPrecisionToolTip">Changes minimum match score required for results.</system:String>
     <system:String x:Key="ShouldUsePinyin">Search with Pinyin</system:String>
     <system:String x:Key="ShouldUsePinyinToolTip">Allows using Pinyin to search. Pinyin is the standard system of romanized spelling for translating Chinese.</system:String>
     <system:String x:Key="AlwaysPreview">Always Preview</system:String>
-    <system:String x:Key="AlwaysPreviewToolTip">Always open preview panel when Flow starts. Press F1 to toggle preview. </system:String>
+    <system:String x:Key="AlwaysPreviewToolTip">Always open preview panel when Flow starts. Press F1 to toggle preview.</system:String>
     <system:String x:Key="shadowEffectNotAllowed">Shadow effect is not allowed while current theme has blur effect enabled</system:String>
 
     <!--  Setting Plugin  -->

Flow.Launcher/Languages/ko.xaml

@@ -1,5 +1,8 @@
-<?xml version="1.0"?>
-<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:system="clr-namespace:System;assembly=mscorlib">
+<?xml version="1.0" ?>
+<ResourceDictionary
+    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+    xmlns:system="clr-namespace:System;assembly=mscorlib">
     <!--  MainWindow  -->
     <system:String x:Key="registerHotkeyFailed">단축키 등록 실패: {0}</system:String>
     <system:String x:Key="couldnotStartCmd">{0}을 실행할 수 없습니다.</system:String>
@@ -59,12 +62,14 @@
     <system:String x:Key="hideOnStartup">시작 시 Flow Launcher 숨김</system:String>
     <system:String x:Key="hideNotifyIcon">트레이 아이콘 숨기기</system:String>
     <system:String x:Key="hideNotifyIconToolTip">트레이에서 아이콘을 숨길 경우, 검색창 우클릭으로 설정창을 열 수 있습니다.</system:String>
+    <system:String x:Key="querySearchDelay">검색 지연 시간</system:String>
+    <system:String x:Key="querySearchDelayToolTip">타이핑이 멈췄을 때 검색 결과가 표시되는 속도를 지정합니다. 빠를수록 타이핑 도중 결과가 갱신됩니다. 기본값은 50ms입니다.</system:String>
     <system:String x:Key="querySearchPrecision">쿼리 검색 정밀도</system:String>
     <system:String x:Key="querySearchPrecisionToolTip">검색 결과에 필요한 최소 매치 점수를 변경합니다.</system:String>
     <system:String x:Key="ShouldUsePinyin">항상 Pinyin 사용</system:String>
     <system:String x:Key="ShouldUsePinyinToolTip">Pinyin을 사용하여 검색할 수 있습니다. Pinyin (병음) 은 로마자 중국어 입력 방식입니다.</system:String>
     <system:String x:Key="AlwaysPreview">항상 미리보기</system:String>
-    <system:String x:Key="AlwaysPreviewToolTip">항상 미리보기 패널이 열린 상태로 Flow를 시작합니다. F1키로 미리보기를 on/off 합니다. </system:String>
+    <system:String x:Key="AlwaysPreviewToolTip">항상 미리보기 패널이 열린 상태로 Flow를 시작합니다. F1키로 미리보기를 on/off 합니다.</system:String>
     <system:String x:Key="shadowEffectNotAllowed">반투명 흐림 효과를 사용하는 경우, 그림자 효과를 쓸 수 없습니다.</system:String>
 
     <!--  Setting Plugin  -->

Flow.Launcher/SettingWindow.xaml

@@ -803,7 +803,40 @@
                                 Padding="0"
                                 CornerRadius="5"
                                 Style="{DynamicResource SettingGroupBox}">
+
                                 <StackPanel Orientation="Vertical">
+                                    <Border
+                                        Margin="0"
+                                        BorderThickness="0"
+                                        Style="{DynamicResource SettingGroupBox}">
+                                        <ItemsControl Style="{StaticResource SettingGrid}">
+                                            <StackPanel Style="{StaticResource TextPanel}">
+                                                <TextBlock
+                                                    Grid.Column="1"
+                                                    VerticalAlignment="Center"
+                                                    Style="{DynamicResource SettingTitleLabel}"
+                                                    Text="{DynamicResource querySearchDelay}" />
+                                                <TextBlock Style="{DynamicResource SettingSubTitleLabel}" Text="{DynamicResource querySearchDelayToolTip}" />
+                                            </StackPanel>
+                                            <ComboBox
+                                                Grid.Column="2"
+                                                MinWidth="95"
+                                                Margin="0,0,18,0"
+                                                VerticalAlignment="Center"
+                                                DisplayMemberPath="Display"
+                                                FontSize="14"
+                                                ItemsSource="{Binding SearchDelays}"
+                                                SelectedValue="{Binding Settings.SearchDelay}"
+                                                SelectedValuePath="Value" />
+                                            <TextBlock Style="{StaticResource Glyph}">
+                                                &#xe916;
+                                            </TextBlock>
+                                        </ItemsControl>
+                                    </Border>
+                                    <Separator
+                                        Width="Auto"
+                                        BorderThickness="1"
+                                        Style="{StaticResource SettingSeparatorStyle}" />
                                     <Border
                                         Margin="0"
                                         BorderThickness="0"

Flow.Launcher/ViewModel/MainViewModel.cs

@@ -670,16 +670,6 @@ private async void QueryResults()
                 SearchIconVisibility = Visibility.Visible;
             }
 
-
-            if (query.ActionKeyword == Plugin.Query.GlobalPluginWildcardSign)
-            {
-                // Wait 45 millisecond for query change in global query
-                // if query changes, return so that it won't be calculated
-                await Task.Delay(45, currentCancellationToken);
-                if (currentCancellationToken.IsCancellationRequested)
-                    return;
-            }
-
             _ = Task.Delay(200, currentCancellationToken).ContinueWith(_ =>
             {
                 // start the progress bar if query takes more than 200 ms and this is the current running query and it didn't finish yet
@@ -689,19 +679,16 @@ private async void QueryResults()
                 }
             }, currentCancellationToken, TaskContinuationOptions.NotOnCanceled, TaskScheduler.Default);
 
-            // plugins is ICollection, meaning LINQ will get the Count and preallocate Array
-
-            var tasks = plugins.Select(plugin => plugin.Metadata.Disabled switch
-            {
-                false => QueryTask(plugin),
-                true => Task.CompletedTask
-            }).ToArray();
-
-
             try
             {
-                // Check the code, WhenAll will translate all type of IEnumerable or Collection to Array, so make an array at first
-                await Task.WhenAll(tasks);
+                await Parallel.ForEachAsync(plugins, currentCancellationToken,
+                    async (pair, token) =>
+                    {
+                        await Task.Delay(pair.Metadata.SearchDelay ?? Settings.SearchDelay, token);
+                        if (pair.Metadata.Disabled)
+                            return;
+                        await QueryTask(pair, token);
+                    });
             }
             catch (OperationCanceledException)
             {
@@ -721,15 +708,12 @@ private async void QueryResults()
             }
 
             // Local function
-            async Task QueryTask(PluginPair plugin)
+            async ValueTask QueryTask(PluginPair plugin, CancellationToken token = default)
             {
-                // Since it is wrapped within a ThreadPool Thread, the synchronous context is null
-                // Task.Yield will force it to run in ThreadPool
-                await Task.Yield();
-
-                IReadOnlyList<Result> results = await PluginManager.QueryForPluginAsync(plugin, query, currentCancellationToken);
+                IReadOnlyList<Result> results = await PluginManager.QueryForPluginAsync(plugin, query, token);
 
-                currentCancellationToken.ThrowIfCancellationRequested();
+                if (token.IsCancellationRequested)
+                    return;
 
                 results ??= _emptyResult;
 

Flow.Launcher/ViewModel/SettingWindowViewModel.cs

@@ -190,6 +190,33 @@ private void UpdateLastQueryModeDisplay()
             }
         }
 
+
+        public class SearchDelay
+        {
+            public string Display { get; set; }
+            public int Value { get; set; }
+        }
+        public List<SearchDelay> SearchDelays
+        {
+            get
+            {
+                List<SearchDelay> delay = new List<SearchDelay>();
+                SearchDelay Fast = new SearchDelay();
+                Fast.Display = "50ms";
+                Fast.Value = 50;
+                SearchDelay Normal = new SearchDelay();
+                Normal.Display = "100ms";
+                Normal.Value = 100;
+                SearchDelay Slow = new SearchDelay();
+                Slow.Display = "150ms";
+                Slow.Value = 150;
+                delay.Add(Fast);
+                delay.Add(Normal);
+                delay.Add(Slow);
+                return delay;
+            }
+        }
+
         public string Language
         {
             get