Add ViClipboardMode Option

This option allows the user to choose if they want the ViRegister to use
the system clipboard or the default local clipboard. By setting
ViClipboardMode to SystemClipboard, the user can easily copy and paste
text in the PowerShell prompt using Vi shortcuts in Command mode.

Author: WestRyanK

PSReadLine/Cmdlets.cs

@@ -50,6 +50,12 @@ public enum ViMode
         Command
     }
 
+    public enum ViClipboardMode
+    {
+        ViRegister,
+        SystemClipboard
+    }
+
     public enum HistorySaveStyle
     {
         SaveIncrementally,
@@ -342,6 +348,11 @@ public object ContinuationPromptColor
         /// </summary>
         public ScriptBlock ViModeChangeHandler { get; set; }
 
+        /// <summary>
+        /// Which source should be used when copying and pasting in vi edit mode?
+        /// </summary>
+        public ViClipboardMode ViClipboardMode { get; set; }
+
         /// <summary>
         /// The path to the saved history.
         /// </summary>
@@ -789,6 +800,14 @@ public ViModeStyle ViModeIndicator
         [Parameter]
         public ScriptBlock ViModeChangeHandler { get; set; }
 
+        [Parameter]
+        public ViClipboardMode ViClipboardMode
+        {
+            get => _viClipboardMode.GetValueOrDefault();
+            set => _viClipboardMode = value;
+        }
+        internal ViClipboardMode? _viClipboardMode;
+
         [Parameter]
         public PredictionSource PredictionSource
         {

PSReadLine/Options.cs

@@ -120,6 +120,10 @@ private void SetOptionsInternal(SetPSReadLineOption options)
                 }
                 Options.ViModeChangeHandler = options.ViModeChangeHandler;
             }
+            if (options._viClipboardMode.HasValue)
+            {
+                Options.ViClipboardMode = options.ViClipboardMode;
+            }
             if (options.HistorySavePath != null)
             {
                 Options.HistorySavePath = options.HistorySavePath;

PSReadLine/PSReadLine.format.ps1xml

@@ -152,6 +152,9 @@ $d = [Microsoft.PowerShell.KeyHandler]::GetGroupingDescription($_.Group)
                   <ItemSelectionCondition><ScriptBlock>$null -ne $_.ViModeChangeHandler</ScriptBlock></ItemSelectionCondition>
                   <PropertyName>ViModeChangeHandler</PropertyName>
               </ListItem>
+              <ListItem>
+                  <PropertyName>ViClipboardMode</PropertyName>
+              </ListItem>
               <ListItem>
                 <PropertyName>WordDelimiters</PropertyName>
               </ListItem>

PSReadLine/ViRegister.cs

@@ -11,7 +11,32 @@ public partial class PSConsoleReadLine
         internal sealed class ViRegister
         {
             private readonly PSConsoleReadLine _singleton;
-            private string _text;
+            private string _localText;
+            private string Text
+            {
+                get
+                {
+                    if (_singleton.Options.ViClipboardMode == ViClipboardMode.ViRegister)
+                    {
+                        return _localText;
+                    }
+                    else
+                    {
+                        return Internal.Clipboard.GetText();
+                    }
+                }
+                set
+                {
+                    if (_singleton.Options.ViClipboardMode == ViClipboardMode.ViRegister)
+                    {
+                        _localText = value;
+                    }
+                    else
+                    {
+                        Internal.Clipboard.SetText(value);
+                    }
+                }
+            }
 
             /// <summary>
             /// Initialize a new instance of the <see cref="ViRegister" /> class.
@@ -29,7 +54,7 @@ public ViRegister(PSConsoleReadLine singleton)
             /// Returns whether this register is empty.
             /// </summary>
             public bool IsEmpty
-                => String.IsNullOrEmpty(_text);
+                => String.IsNullOrEmpty(Text);
 
             /// <summary>
             /// Returns whether this register contains
@@ -41,7 +66,7 @@ public bool IsEmpty
             /// Gets the raw text contained in the register
             /// </summary>
             public string RawText
-                => _text;
+                => Text;
 
             /// <summary>
             /// Records the entire buffer in the register.
@@ -67,7 +92,7 @@ public void Record(StringBuilder buffer, int offset, int count)
                 System.Diagnostics.Debug.Assert(offset + count <= buffer.Length);
 
                 HasLinewiseText = false;
-                _text = buffer.ToString(offset, count);
+                Text = buffer.ToString(offset, count);
             }
 
             /// <summary>
@@ -77,7 +102,7 @@ public void Record(StringBuilder buffer, int offset, int count)
             public void LinewiseRecord(string text)
             {
                 HasLinewiseText = true;
-                _text = text;
+                Text = text;
             }
 
             public int PasteAfter(StringBuilder buffer, int position)
@@ -89,7 +114,7 @@ public int PasteAfter(StringBuilder buffer, int position)
 
                 if (HasLinewiseText)
                 {
-                    var text = _text;
+                    var text = Text;
 
                     if (text[0] != '\n')
                     {
@@ -127,8 +152,9 @@ public int PasteAfter(StringBuilder buffer, int position)
                         position += 1;
                     }
 
-                    InsertAt(buffer, _text, position, position);
-                    position += _text.Length - 1;
+                    var text = Text;
+                    InsertAt(buffer, text, position, position);
+                    position += text.Length - 1;
 
                     return position;
                 }
@@ -145,7 +171,7 @@ public int PasteBefore(StringBuilder buffer, int position)
 
                     position = Math.Max(0, Math.Min(position, buffer.Length - 1));
 
-                    var text = _text;
+                    var text = Text;
 
                     if (text[0] == '\n')
                     {
@@ -184,8 +210,9 @@ public int PasteBefore(StringBuilder buffer, int position)
                 }
                 else
                 {
-                    InsertAt(buffer, _text, position, position);
-                    return position + _text.Length - 1;
+                    var text = Text;
+                    InsertAt(buffer, text, position, position);
+                    return position + text.Length - 1;
                 }
             }