From 77e1c35e52713b32f7118ed32d923d9f05c43655 Mon Sep 17 00:00:00 2001
From: "Valeriano A.R" <valen.alfonso@gmail.com>
Date: Sun, 25 Feb 2018 09:45:56 +0100
Subject: [PATCH] FrmProxyCmd: Command history.

---
 VAR.Toolbox/UI/FrmProxyCmd.cs | 47 ++++++++++++++++++++++++++++++-----
 1 file changed, 41 insertions(+), 6 deletions(-)

diff --git a/VAR.Toolbox/UI/FrmProxyCmd.cs b/VAR.Toolbox/UI/FrmProxyCmd.cs
index 6c4aa17..55ffc4f 100644
--- a/VAR.Toolbox/UI/FrmProxyCmd.cs
+++ b/VAR.Toolbox/UI/FrmProxyCmd.cs
@@ -14,6 +14,9 @@ namespace VAR.Toolbox.UI
         
         private object _executionLock = new object();
 
+        private List<string> _cmdHistory = new List<string>();
+        private int _currentHistoryIndex = -1;
+
         private void txtInput_KeyDown(object sender, KeyEventArgs e)
         {
             if (Monitor.IsEntered(_executionLock))
@@ -25,12 +28,15 @@ namespace VAR.Toolbox.UI
             if (e.KeyCode == Keys.Return)
             {
                 e.Handled = true;
-                string cmd = txtInput.Text.Replace("\n", "").Replace("\r", "");
-                txtInput.Text = string.Empty;
-                Application.DoEvents();
-                txtInput.Text = string.Empty;
-                OutputLine(cmd);
-                new Thread(() => ExecuteCmd(cmd)).Start();
+                string cmd = txtInput.Text.TrimStart().Replace("\n", "").Replace("\r", "");
+                if (string.IsNullOrEmpty(cmd) == false)
+                {
+                    txtInput.Text = string.Empty;
+                    Application.DoEvents();
+                    txtInput.Text = string.Empty;
+                    OutputLine(cmd);
+                    new Thread(() => ExecuteCmd(cmd)).Start();
+                }
                 return;
             }
             if(e.KeyCode == Keys.Enter)
@@ -46,11 +52,38 @@ namespace VAR.Toolbox.UI
             if (e.KeyCode == Keys.Up)
             {
                 e.Handled = true;
+                if (_currentHistoryIndex == -1) { _currentHistoryIndex = _cmdHistory.Count; }
+                _currentHistoryIndex--;
+                if (_currentHistoryIndex < 0)
+                {
+                    _currentHistoryIndex = 0;
+                }
+                if (_currentHistoryIndex>=0 && _currentHistoryIndex < _cmdHistory.Count)
+                {
+                    txtInput.Text = _cmdHistory[_currentHistoryIndex];
+                    txtInput.SelectionStart = txtInput.Text.Length;
+                    txtInput.SelectionLength = 0;
+                }
                 return;
             }
             if (e.KeyCode == Keys.Down)
             {
                 e.Handled = true;
+                if (_currentHistoryIndex > -1)
+                {
+                    _currentHistoryIndex++;
+                    if (_currentHistoryIndex >= _cmdHistory.Count)
+                    {
+                        txtInput.Text = string.Empty;
+                        _currentHistoryIndex = -1;
+                    }
+                    else
+                    {
+                        txtInput.Text = _cmdHistory[_currentHistoryIndex];
+                        txtInput.SelectionStart = txtInput.Text.Length;
+                        txtInput.SelectionLength = 0;
+                    }
+                }
                 return;
             }
         }
@@ -66,6 +99,8 @@ namespace VAR.Toolbox.UI
             Monitor.Enter(_executionLock);
             try
             {
+                _cmdHistory.Add(cmdString);
+                _currentHistoryIndex = -1;
                 _proxyCmdExecutor.ExecuteCmd(cmdString, this);
             }
             catch (Exception ex)