Merge pull request #58 from molsonkiko/add_keypress_processing_delay

Add keypress processing delay

Author: young-developer

NppNavigateTo/Forms/FrmNavigateTo.cs

@@ -9,8 +9,10 @@
 using System.Net;
 using System.Reflection;
 using System.Reflection.Emit;
+using System.Runtime.CompilerServices;
 using System.Text;
 using System.Text.RegularExpressions;
+using System.Threading;
 using System.Windows.Controls;
 using System.Windows.Documents;
 using System.Windows.Forms;
@@ -67,6 +69,12 @@ partial class FrmNavigateTo : Form
 
         private Glob glob { get; set; }
 
+        const int lastKeyPressTimerInterval = 250;
+
+        private System.Timers.Timer lastKeyPressTimer;
+
+        private long lastKeypressTicks;
+
         /// <summary>
         /// function used to filter filenames when not using fuzzy matchin
         /// </summary>
@@ -85,8 +93,6 @@ partial class FrmNavigateTo : Form
 
         private bool tooManyResultsToHighlight { get; set; } = false;
 
-        private bool lastCharCannotChangeResults { get; set; } = false;
-
         public FrmNavigateTo(IScintillaGateway editor, INotepadPPGateway notepad)
         {
             this.editor = editor;
@@ -102,6 +108,11 @@ public FrmNavigateTo(IScintillaGateway editor, INotepadPPGateway notepad)
             //backgroundWorker.WorkerSupportsCancellation = true;
             //backgroundWorker.DoWork += BackgroundWorker_DoWork;
             glob = new Glob();
+            lastKeyPressTimer = new System.Timers.Timer();
+            lastKeyPressTimer.AutoReset = false;
+            lastKeyPressTimer.Interval = lastKeyPressTimerInterval;
+            lastKeyPressTimer.Elapsed += LastKeyPressTimer_Elapsed;
+            lastKeypressTicks = 0;
             nonFuzzyFilterFunc = null;
             InitializeComponent();
             ReloadFileList();
@@ -518,7 +529,6 @@ private void dataGridView1_MouseClick(object sender, MouseEventArgs e)
 
         private void SearchComboBoxKeyDown(object sender, KeyEventArgs e)
         {
-            lastCharCannotChangeResults = false;
             switch (e.KeyCode)
             {
                 case Keys.Back:
@@ -574,12 +584,6 @@ private void SearchComboBoxKeyDown(object sender, KeyEventArgs e)
                     e.Handled = true;
                     e.SuppressKeyPress = true;
                     break;
-
-                case Keys.Space:
-                    // adding space can't change the results
-                    // unless the space is part of a character class in a glob (e.g. "[ ]" matches literal whitespace)
-                    lastCharCannotChangeResults = searchComboBox.Text.IndexOf('[') == -1;
-                    break;
             }
         }
 
@@ -656,23 +660,33 @@ private bool NavigateGridDown(bool isShiftPressed)
 
         private void SearchComboBoxTextChanged(object sender, EventArgs e)
         {
-            if (lastCharCannotChangeResults)
-                return;
-            int textLength = searchComboBox.Text.Length;
-            bool emptyText = string.IsNullOrWhiteSpace(searchComboBox.Text);
-            int minLength = FrmSettings.Settings.GetIntSetting(Settings.minTypeCharLimit);
+            lastKeyPressTimer.Start();
+            lastKeypressTicks = System.DateTime.UtcNow.Ticks;
+        }
 
-            if (emptyText)
-                ReloadFileList();
-            if (textLength > minLength || emptyText)
-            {
-                FilterDataGrid(searchComboBox.Text);
-            }
+        private void LastKeyPressTimer_Elapsed(object sender, EventArgs e)
+        {
+            Invoke(new Action(() =>
+            {
+                // allow keypresses more recent than the interval, because we can't rely on precise timing of this event firing
+                if (System.DateTime.UtcNow.Ticks <= lastKeypressTicks + System.TimeSpan.TicksPerMillisecond * lastKeyPressTimerInterval / 10)
+                    return;
+                int textLength = searchComboBox.Text.Length;
+                bool emptyText = string.IsNullOrWhiteSpace(searchComboBox.Text);
+                int minLength = FrmSettings.Settings.GetIntSetting(Settings.minTypeCharLimit);
+
+                if (emptyText)
+                    ReloadFileList();
+                if (textLength > minLength || emptyText)
+                {
+                    FilterDataGrid(searchComboBox.Text);
+                }
 
-            if (FrmSettings.Settings.GetBoolSetting(Settings.selectFirstRowOnFilter))
-            {
-                SelectFirstRow();
-            }
+                if (FrmSettings.Settings.GetBoolSetting(Settings.selectFirstRowOnFilter))
+                {
+                    SelectFirstRow();
+                }
+            }));
         }
 
         private void SelectFirstRow()

NppNavigateTo/Properties/AssemblyInfo.cs

@@ -29,5 +29,5 @@
 //      Build Number
 //      Revision
 //
-[assembly: AssemblyVersion("2.6.5.0")]
-[assembly: AssemblyFileVersion("2.6.5.0")]
+[assembly: AssemblyVersion("2.6.5.1")]
+[assembly: AssemblyFileVersion("2.6.5.1")]