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Copy pathReadLine.vi.cs
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1387 lines (1237 loc) · 51.1 KB
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/********************************************************************++
Copyright (c) Microsoft Corporation. All rights reserved.
--********************************************************************/
using System;
using System.Collections.Generic;
using System.Globalization;
namespace Microsoft.PowerShell
{
public partial class PSConsoleReadLine
{
/// <summary>
/// Remembers last history search direction.
/// </summary>
private bool _searchHistoryBackward = true;
private class ViCharacterSearcher
{
private char searchChar = '\0';
private bool wasBackward;
private bool wasBackoff;
public static readonly ViCharacterSearcher instance = new ViCharacterSearcher();
public static bool IsRepeatable => instance.searchChar != '\0';
public static char SearchChar => instance.searchChar;
public static bool WasBackward => instance.wasBackward;
public static bool WasBackoff => instance.wasBackoff;
public static void Set(char theChar, bool isBackward, bool isBackoff)
{
instance.searchChar = theChar;
instance.wasBackward = isBackward;
instance.wasBackoff = isBackoff;
}
public static void Search(char keyChar, object arg, bool backoff)
{
int qty = arg as int? ?? 1;
for (int i = _singleton._current + 1; i < _singleton._buffer.Length; i++)
{
if (_singleton._buffer[i] == keyChar)
{
qty -= 1;
if (qty == 0)
{
_singleton.MoveCursor(backoff ? i - 1 : i);
return;
}
}
}
Ding();
}
public static bool SearchDelete(char keyChar, object arg, bool backoff, Action<ConsoleKeyInfo?, object> instigator)
{
int qty = arg as int? ?? 1;
for (int i = _singleton._current + 1; i < _singleton._buffer.Length; i++)
{
if (_singleton._buffer[i] == keyChar)
{
qty -= 1;
if (qty == 0)
{
DeleteToEndPoint(arg, backoff ? i : i + 1, instigator);
return true;
}
}
}
Ding();
return false;
}
public static void SearchBackward(char keyChar, object arg, bool backoff)
{
int qty = arg as int? ?? 1;
for (int i = _singleton._current - 1; i >= 0; i--)
{
if (_singleton._buffer[i] == keyChar)
{
qty -= 1;
if (qty == 0)
{
_singleton.MoveCursor(backoff ? i + 1 : i);
return;
}
}
}
Ding();
}
public static bool SearchBackwardDelete(char keyChar, object arg, bool backoff, Action<ConsoleKeyInfo?, object> instigator)
{
Set(keyChar, isBackward: true, isBackoff: backoff);
int qty = arg as int? ?? 1;
for (int i = _singleton._current - 1; i >= 0; i--)
{
if (_singleton._buffer[i] == keyChar)
{
qty -= 1;
if (qty == 0)
{
DeleteBackwardToEndPoint(arg, backoff ? i + 1 : i, instigator);
return true;
}
}
}
Ding();
return false;
}
}
/// <summary>
/// Repeat the last recorded character search.
/// </summary>
public static void RepeatLastCharSearch(ConsoleKeyInfo? key = null, object arg = null)
{
if (!ViCharacterSearcher.IsRepeatable)
{
Ding();
return;
}
if (ViCharacterSearcher.WasBackward)
{
ViCharacterSearcher.SearchBackward(ViCharacterSearcher.SearchChar, null, ViCharacterSearcher.WasBackoff);
}
else
{
ViCharacterSearcher.Search(ViCharacterSearcher.SearchChar, null, ViCharacterSearcher.WasBackoff);
}
}
/// <summary>
/// Repeat the last recorded character search, but in the opposite direction.
/// </summary>
public static void RepeatLastCharSearchBackwards(ConsoleKeyInfo? key = null, object arg = null)
{
if (!ViCharacterSearcher.IsRepeatable)
{
Ding();
return;
}
if (ViCharacterSearcher.WasBackward)
{
ViCharacterSearcher.Search(ViCharacterSearcher.SearchChar, null, ViCharacterSearcher.WasBackoff);
}
else
{
ViCharacterSearcher.SearchBackward(ViCharacterSearcher.SearchChar, null, ViCharacterSearcher.WasBackoff);
}
}
/// <summary>
/// Read the next character and then find it, going forward, and then back off a character.
/// This is for 't' functionality.
/// </summary>
public static void SearchChar(ConsoleKeyInfo? key = null, object arg = null)
{
char keyChar = ReadKey().KeyChar;
ViCharacterSearcher.Set(keyChar, isBackward: false, isBackoff: false);
ViCharacterSearcher.Search(keyChar, arg, backoff: false);
}
/// <summary>
/// Read the next character and then find it, going backward, and then back off a character.
/// This is for 'T' functionality.
/// </summary>
public static void SearchCharBackward(ConsoleKeyInfo? key = null, object arg = null)
{
char keyChar = ReadKey().KeyChar;
ViCharacterSearcher.Set(keyChar, isBackward: true, isBackoff: false);
ViCharacterSearcher.SearchBackward(keyChar, arg, backoff: false);
}
/// <summary>
/// Read the next character and then find it, going forward, and then back off a character.
/// This is for 't' functionality.
/// </summary>
public static void SearchCharWithBackoff(ConsoleKeyInfo? key = null, object arg = null)
{
char keyChar = ReadKey().KeyChar;
ViCharacterSearcher.Set(keyChar, isBackward: false, isBackoff: true);
ViCharacterSearcher.Search(keyChar, arg, backoff: true);
}
/// <summary>
/// Read the next character and then find it, going backward, and then back off a character.
/// This is for 'T' functionality.
/// </summary>
public static void SearchCharBackwardWithBackoff(ConsoleKeyInfo? key = null, object arg = null)
{
char keyChar = ReadKey().KeyChar;
ViCharacterSearcher.Set(keyChar, isBackward: true, isBackoff: true);
ViCharacterSearcher.SearchBackward(keyChar, arg, backoff: true);
}
/// <summary>
/// Exits the shell.
/// </summary>
public static void ViExit(ConsoleKeyInfo? key = null, object arg = null)
{
throw new ExitException();
}
/// <summary>
/// Delete to the end of the line.
/// </summary>
public static void DeleteToEnd(ConsoleKeyInfo? key = null, object arg = null)
{
if (_singleton._current >= _singleton._buffer.Length)
{
Ding();
return;
}
var lineCount = _singleton.GetLogicalLineCount();
var lineIndex = _singleton.GetLogicalLineNumber() - 1;
if (TryGetArgAsInt(arg, out var requestedLineCount, 1))
{
var targetLineIndex = lineIndex + requestedLineCount - 1;
if (targetLineIndex >= lineCount)
{
targetLineIndex = lineCount - 1;
}
var startPosition = _singleton._current;
var endPosition = GetEndOfNthLogicalLinePos(targetLineIndex);
var length = endPosition - startPosition + 1;
if (length > 0)
{
_clipboard.Record(_singleton._buffer, startPosition, length);
_singleton.SaveEditItem(EditItemDelete.Create(
_clipboard,
_singleton._current,
DeleteToEnd,
arg));
_singleton._buffer.Remove(_singleton._current, length);
// the cursor will go back one character, unless at the beginning of the line
var endOfLineCursorPos = GetEndOfLogicalLinePos(_singleton._current) - 1;
var beginningOfLinePos = GetBeginningOfLinePos(_singleton._current);
_singleton._current = Math.Max(
beginningOfLinePos,
Math.Min(_singleton._current, endOfLineCursorPos));
_singleton.Render();
}
}
}
/// <summary>
/// Delete the next word.
/// </summary>
public static void DeleteWord(ConsoleKeyInfo? key = null, object arg = null)
{
int qty = arg as int? ?? 1;
int endPoint = _singleton._current;
for (int i = 0; i < qty; i++)
{
endPoint = _singleton.ViFindNextWordPoint(endPoint, _singleton.Options.WordDelimiters);
}
if (endPoint <= _singleton._current)
{
Ding();
return;
}
DeleteToEndPoint(arg, endPoint, DeleteWord);
}
private static void DeleteToEndPoint(object arg, int endPoint, Action<ConsoleKeyInfo?, object> instigator)
{
_singleton.SaveToClipboard(_singleton._current, endPoint - _singleton._current);
_singleton.SaveEditItem(EditItemDelete.Create(
_clipboard,
_singleton._current,
instigator,
arg
));
_singleton._buffer.Remove(_singleton._current, endPoint - _singleton._current);
if (_singleton._current >= _singleton._buffer.Length)
{
_singleton._current = Math.Max(0, _singleton._buffer.Length - 1);
}
_singleton.Render();
}
private static void DeleteBackwardToEndPoint(object arg, int endPoint, Action<ConsoleKeyInfo?, object> instigator)
{
int deleteLength = _singleton._current - endPoint;
_singleton.SaveToClipboard(endPoint, deleteLength);
_singleton.SaveEditItem(EditItemDelete.Create(
_clipboard,
endPoint,
instigator,
arg
));
_singleton._buffer.Remove(endPoint, deleteLength);
_singleton._current = endPoint;
_singleton.Render();
}
/// <summary>
/// Delete the next glob (white space delimited word).
/// </summary>
public static void ViDeleteGlob(ConsoleKeyInfo? key = null, object arg = null)
{
int qty = arg as int? ?? 1;
int endPoint = _singleton._current;
while (qty-- > 0)
{
endPoint = _singleton.ViFindNextGlob(endPoint);
}
int length = endPoint - _singleton._current;
_singleton.SaveToClipboard(_singleton._current, length);
_singleton.SaveEditItem(EditItemDelete.Create(
_clipboard,
_singleton._current,
ViDeleteGlob,
arg
));
_singleton._buffer.Remove(_singleton._current, length);
if (_singleton._current >= _singleton._buffer.Length)
{
_singleton._current = Math.Max(0, _singleton._buffer.Length - 1);
}
_singleton.Render();
}
/// <summary>
/// Delete to the end of the word.
/// </summary>
public static void DeleteEndOfWord(ConsoleKeyInfo? key = null, object arg = null)
{
int qty = arg as int? ?? 1;
int endPoint = _singleton._current;
for (int i = 0; i < qty; i++)
{
endPoint = _singleton.ViFindNextWordEnd(endPoint, _singleton.Options.WordDelimiters);
}
if (endPoint <= _singleton._current)
{
Ding();
return;
}
_singleton.SaveToClipboard(_singleton._current, 1 + endPoint - _singleton._current);
_singleton.SaveEditItem(EditItemDelete.Create(
_clipboard,
_singleton._current,
DeleteEndOfWord,
arg
));
_singleton._buffer.Remove(_singleton._current, 1 + endPoint - _singleton._current);
if (_singleton._current >= _singleton._buffer.Length)
{
_singleton._current = Math.Max(0, _singleton._buffer.Length - 1);
}
_singleton.Render();
}
/// <summary>
/// Delete to the end of the word.
/// </summary>
public static void ViDeleteEndOfGlob(ConsoleKeyInfo? key = null, object arg = null)
{
int qty = arg as int? ?? 1;
int endPoint = _singleton._current;
for (int i = 0; i < qty; i++)
{
endPoint = _singleton.ViFindGlobEnd(endPoint);
}
_singleton.SaveToClipboard(_singleton._current, 1 + endPoint - _singleton._current);
_singleton.SaveEditItem(EditItemDelete.Create(
_clipboard,
_singleton._current,
ViDeleteEndOfGlob,
arg
));
_singleton._buffer.Remove(_singleton._current, 1 + endPoint - _singleton._current);
if (_singleton._current >= _singleton._buffer.Length)
{
_singleton._current = Math.Max(0, _singleton._buffer.Length - 1);
}
_singleton.Render();
}
/// <summary>
/// Deletes until given character.
/// </summary>
public static void ViDeleteToChar(ConsoleKeyInfo? key = null, object arg = null)
{
var keyChar = ReadKey().KeyChar;
ViDeleteToChar(keyChar, key, arg);
}
/// <summary>
/// Deletes until given character.
/// </summary>
public static void ViDeleteToChar(char keyChar, ConsoleKeyInfo? key = null, object arg = null)
{
ViCharacterSearcher.Set(keyChar, isBackward: false, isBackoff: false);
ViCharacterSearcher.SearchDelete(keyChar, arg, backoff: false, instigator: (_key, _arg) => ViDeleteToChar(keyChar, _key, _arg));
}
/// <summary>
/// Deletes backwards until given character.
/// </summary>
public static void ViDeleteToCharBackward(ConsoleKeyInfo? key = null, object arg = null)
{
var keyChar = ReadKey().KeyChar;
ViDeleteToCharBack(keyChar, key, arg);
}
/// <summary>
/// Deletes backwards until given character.
/// </summary>
public static void ViDeleteToCharBack(char keyChar, ConsoleKeyInfo? key = null, object arg = null)
{
ViCharacterSearcher.SearchBackwardDelete(keyChar, arg, backoff: false, instigator: (_key, _arg) => ViDeleteToCharBack(keyChar, _key, _arg));
}
/// <summary>
/// Deletes until given character.
/// </summary>
public static void ViDeleteToBeforeChar(ConsoleKeyInfo? key = null, object arg = null)
{
var keyChar = ReadKey().KeyChar;
ViDeleteToBeforeChar(keyChar, key, arg);
}
/// <summary>
/// Deletes until given character.
/// </summary>
public static void ViDeleteToBeforeChar(char keyChar, ConsoleKeyInfo? key = null, object arg = null)
{
ViCharacterSearcher.Set(keyChar, isBackward: false, isBackoff: true);
ViCharacterSearcher.SearchDelete(keyChar, arg, backoff: true, instigator: (_key, _arg) => ViDeleteToBeforeChar(keyChar, _key, _arg));
}
/// <summary>
/// Deletes until given character.
/// </summary>
public static void ViDeleteToBeforeCharBackward(ConsoleKeyInfo? key = null, object arg = null)
{
var keyChar = ReadKey().KeyChar;
ViDeleteToBeforeCharBack(keyChar, key, arg);
}
private static void ViDeleteToBeforeCharBack(char keyChar, ConsoleKeyInfo? key = null, object arg = null)
{
ViCharacterSearcher.Set(keyChar, isBackward: true, isBackoff: true);
ViCharacterSearcher.SearchBackwardDelete(keyChar, arg, backoff: true, instigator: (_key, _arg) => ViDeleteToBeforeCharBack(keyChar, _key, _arg));
}
/// <summary>
/// Ring the bell.
/// </summary>
private static void Ding(ConsoleKeyInfo? key = null, object arg = null)
{
Ding();
}
/// <summary>
/// Switch the current operating mode from Vi-Insert to Vi-Command.
/// </summary>
public static void ViCommandMode(ConsoleKeyInfo? key = null, object arg = null)
{
if (_singleton._editGroupStart >= 0)
{
_singleton._groupUndoHelper.EndGroup();
}
_singleton._dispatchTable = _viCmdKeyMap;
_singleton._chordDispatchTable = _viCmdChordTable;
ViBackwardChar();
_singleton.ViIndicateCommandMode();
}
/// <summary>
/// Switch to Insert mode.
/// </summary>
public static void ViInsertMode(ConsoleKeyInfo? key = null, object arg = null)
{
_singleton._dispatchTable = _viInsKeyMap;
_singleton._chordDispatchTable = _viInsChordTable;
_singleton.ViIndicateInsertMode();
}
/// <summary>
/// Returns true if in Vi Command mode, otherwise false.
/// </summary>
public static bool InViCommandMode() => _singleton._dispatchTable == _viCmdKeyMap;
/// <summary>
/// Returns true if in Vi Insert mode, otherwise false.
/// </summary>
public static bool InViInsertMode() => _singleton._dispatchTable == _viInsKeyMap;
/// <summary>
/// Temporarily swap in Vi-Command dispatch tables. Used for setting handlers.
/// </summary>
internal static IDisposable UseViCommandModeTables()
{
var oldDispatchTable = _singleton._dispatchTable;
var oldChordDispatchTable = _singleton._chordDispatchTable;
_singleton._dispatchTable = _viCmdKeyMap;
_singleton._chordDispatchTable = _viCmdChordTable;
return new Disposable(() =>
{
_singleton._dispatchTable = oldDispatchTable;
_singleton._chordDispatchTable = oldChordDispatchTable;
});
}
/// <summary>
/// Temporarily swap in Vi-Insert dispatch tables. Used for setting handlers.
/// </summary>
internal static IDisposable UseViInsertModeTables()
{
var oldDispatchTable = _singleton._dispatchTable;
var oldChordDispatchTable = _singleton._chordDispatchTable;
_singleton._dispatchTable = _viInsKeyMap;
_singleton._chordDispatchTable = _viInsChordTable;
return new Disposable(() =>
{
_singleton._dispatchTable = oldDispatchTable;
_singleton._chordDispatchTable = oldChordDispatchTable;
});
}
private void ViIndicateCommandMode()
{
// Show suggestion in 'InsertMode' but not 'CommandMode'.
_prediction.DisableGlobal(cursorAtEol: false);
if (_options.ViModeIndicator == ViModeStyle.Cursor)
{
_console.CursorSize = _normalCursorSize < 50 ? 100 : 25;
}
else if (_options.ViModeIndicator == ViModeStyle.Prompt)
{
ConsoleColor savedBackground = _console.BackgroundColor;
_console.BackgroundColor = AlternateBackground(_console.BackgroundColor);
InvokePrompt();
_console.BackgroundColor = savedBackground;
}
else if (_options.ViModeIndicator == ViModeStyle.Script && _options.ViModeChangeHandler != null)
{
_options.ViModeChangeHandler.InvokeReturnAsIs(ViMode.Command);
}
}
private void ViIndicateInsertMode()
{
// Show suggestion in 'InsertMode' but not 'CommandMode'.
_prediction.EnableGlobal();
if (_options.ViModeIndicator == ViModeStyle.Cursor)
{
_console.CursorSize = _normalCursorSize;
}
else if (_options.ViModeIndicator == ViModeStyle.Prompt)
{
InvokePrompt();
}
else if (_options.ViModeIndicator == ViModeStyle.Script && _options.ViModeChangeHandler != null)
{
_options.ViModeChangeHandler.InvokeReturnAsIs(ViMode.Insert);
}
}
/// <summary>
/// Switch to Insert mode and position the cursor at the beginning of the line.
/// </summary>
public static void ViInsertAtBegining(ConsoleKeyInfo? key = null, object arg = null)
{
ViInsertMode(key, arg);
BeginningOfLine(key, arg);
}
/// <summary>
/// Switch to Insert mode and position the cursor at the end of the line.
/// </summary>
public static void ViInsertAtEnd(ConsoleKeyInfo? key = null, object arg = null)
{
ViInsertMode(key, arg);
EndOfLine(key, arg);
}
/// <summary>
/// Append from the current line position.
/// </summary>
public static void ViInsertWithAppend(ConsoleKeyInfo? key = null, object arg = null)
{
ViInsertMode(key, arg);
ForwardChar(key, arg);
}
/// <summary>
/// Delete the current character and switch to Insert mode.
/// </summary>
public static void ViInsertWithDelete(ConsoleKeyInfo? key = null, object arg = null)
{
_singleton._groupUndoHelper.StartGroup(ViInsertWithDelete, arg);
ViInsertMode(key, arg);
DeleteChar(key, arg);
}
/// <summary>
/// Accept the line and switch to Insert mode.
/// </summary>
public static void ViAcceptLine(ConsoleKeyInfo? key = null, object arg = null)
{
ViInsertMode(key, arg);
AcceptLine(key, arg);
}
/// <summary>
/// Prepend a '#' and accept the line.
/// </summary>
public static void PrependAndAccept(ConsoleKeyInfo? key = null, object arg = null)
{
BeginningOfLine(key, arg);
SelfInsert(key, arg);
ViAcceptLine(key, arg);
}
/// <summary>
/// Invert the case of the current character and move to the next one.
/// </summary>
public static void InvertCase(ConsoleKeyInfo? key = null, object arg = null)
{
if (_singleton._current >= _singleton._buffer.Length)
{
Ding();
return;
}
int qty = arg as int? ?? 1;
for (; qty > 0 && _singleton._current < _singleton._buffer.Length; qty--)
{
char c = _singleton._buffer[_singleton._current];
if (Char.IsLetter(c))
{
char newChar = Char.IsUpper(c) ? Char.ToLower(c, CultureInfo.CurrentCulture) : char.ToUpper(c, CultureInfo.CurrentCulture);
EditItem delEditItem = EditItemDelete.Create(c.ToString(), _singleton._current);
EditItem insEditItem = EditItemInsertChar.Create(newChar, _singleton._current);
_singleton.SaveEditItem(GroupedEdit.Create(new List<EditItem>
{
delEditItem,
insEditItem
},
InvertCase,
arg
));
_singleton._buffer[_singleton._current] = newChar;
}
_singleton.MoveCursor(Math.Min(_singleton._current + 1, _singleton._buffer.Length));
}
_singleton.Render();
}
/// <summary>
/// Swap the current character and the one before it.
/// </summary>
public static void SwapCharacters(ConsoleKeyInfo? key = null, object arg = null)
{
// if in vi command mode, the cursor can't go as far
var bufferLength = _singleton._buffer.Length;
int cursorRightLimit = bufferLength + ViEndOfLineFactor;
if (_singleton._current <= 0 || bufferLength < 2 || _singleton._current > cursorRightLimit)
{
Ding();
return;
}
int cursor = _singleton._current;
if (cursor == bufferLength)
--cursor; // if at end of line, swap previous two chars
char current = _singleton._buffer[cursor];
char previous = _singleton._buffer[cursor - 1];
_singleton.StartEditGroup();
_singleton.SaveEditItem(EditItemDelete.Create(_singleton._buffer.ToString(cursor - 1, 2), cursor - 1));
_singleton.SaveEditItem(EditItemInsertChar.Create(current, cursor - 1));
_singleton.SaveEditItem(EditItemInsertChar.Create(previous, cursor));
_singleton.EndEditGroup();
_singleton._buffer[cursor] = previous;
_singleton._buffer[cursor - 1] = current;
_singleton.MoveCursor(Math.Min(cursor + 1, cursorRightLimit));
_singleton.Render();
}
/// <summary>
/// Deletes text from the cursor to the first non-blank character of the line.
/// </summary>
public static void DeleteLineToFirstChar(ConsoleKeyInfo? key = null, object arg = null)
{
if (_singleton._current > 0)
{
var i = GetFirstNonBlankOfLogicalLinePos(_singleton._current);
_singleton.SaveToClipboard(i, _singleton._current - i);
_singleton.SaveEditItem(EditItemDelete.Create(_clipboard, i, DeleteLineToFirstChar));
_singleton._buffer.Remove(i, _singleton._current - i);
_singleton._current = i;
_singleton.Render();
}
else
{
Ding();
}
}
/// <summary>
/// Deletes the current line, enabling undo.
/// </summary>
public static void DeleteLine(ConsoleKeyInfo? key = null, object arg = null)
{
var lineCount = _singleton.GetLogicalLineCount();
var lineIndex = _singleton.GetLogicalLineNumber() - 1;
TryGetArgAsInt(arg, out var requestedLineCount, 1);
var deletePosition = DeleteLineImpl(lineIndex, requestedLineCount);
// goto the first character of the first remaining logical line
var newCurrent = deletePosition + 1;
if (lineIndex + requestedLineCount >= lineCount)
{
// if the delete operation has removed all the remaining lines
// goto the first character of the previous logical line
newCurrent = GetBeginningOfLinePos(deletePosition);
}
_singleton._current = newCurrent;
_singleton.Render();
}
/// <summary>
/// Deletes as many requested lines from the buffer
/// starting from the specified line index, and
/// return the offset to the deleted position.
/// </summary>
/// <returns></returns>
private static int DeleteLineImpl(int lineIndex, int lineCount)
{
var range = _singleton._buffer.GetRange(lineIndex, lineCount);
var deleteText = _singleton._buffer.ToString(range.Offset, range.Count);
_clipboard.LinewiseRecord(deleteText);
var deletePosition = range.Offset;
var anchor = _singleton._current;
_singleton._buffer.Remove(range.Offset, range.Count);
_singleton.SaveEditItem(
EditItemDeleteLines.Create(
deleteText,
deletePosition,
anchor));
return deletePosition;
}
/// <summary>
/// Deletes from the current logical line to the end of the buffer.
/// </summary>
public static void DeleteEndOfBuffer(ConsoleKeyInfo? key = null, object arg = null)
{
var lineIndex = _singleton.GetLogicalLineNumber() - 1;
var lineCount = _singleton.GetLogicalLineCount() - lineIndex;
DeleteLineImpl(lineIndex, lineCount);
// move the cursor to the beginning of the previous line
var previousLineIndex = Math.Max(0, lineIndex - 1);
var newPosition = GetBeginningOfNthLinePos(previousLineIndex);
_singleton._current = newPosition;
_singleton.Render();
}
/// <summary>
/// Deletes the current and next n logical lines.
/// </summary>
private static void DeleteNextLines(ConsoleKeyInfo? key = null, object arg = null)
{
if (TryGetArgAsInt(arg, out int requestedLineCount, 1))
{
DeleteLine(key, requestedLineCount + 1);
}
}
/// <summary>
/// Deletes from the previous n logical lines to the current logical line included.
/// </summary>
public static void DeletePreviousLines(ConsoleKeyInfo? key = null, object arg = null)
{
if (TryGetArgAsInt(arg, out int requestedLineCount, 1))
{
var currentLineIndex = _singleton.GetLogicalLineNumber() - 1;
var startLineIndex = Math.Max(0, currentLineIndex - requestedLineCount);
DeleteLineImpl(startLineIndex, currentLineIndex - startLineIndex + 1);
// go the beginning of the line at index 'startLineIndex'
// or at the beginning of the last line
startLineIndex = Math.Min(startLineIndex, _singleton.GetLogicalLineCount() - 1);
var newCurrent = GetBeginningOfNthLinePos(startLineIndex);
_singleton._current = newCurrent;
_singleton.Render();
}
}
/// <summary>
/// Delete from the current logical line to the n-th requested logical line in a multiline buffer
/// </summary>
private static void DeleteRelativeLines(ConsoleKeyInfo? key = null, object arg = null)
{
if (TryGetArgAsInt(arg, out var requestedLineNumber, 1))
{
var currentLineIndex = _singleton.GetLogicalLineNumber() - 1;
var requestedLineIndex = requestedLineNumber - 1;
if (requestedLineIndex < 0)
{
requestedLineIndex = 0;
}
var logicalLineCount = _singleton.GetLogicalLineCount();
if (requestedLineIndex >= logicalLineCount)
{
requestedLineIndex = logicalLineCount - 1;
}
var requestedLineCount = requestedLineIndex - currentLineIndex;
if (requestedLineCount < 0)
{
DeletePreviousLines(null, -requestedLineCount);
}
else
{
DeleteNextLines(null, requestedLineCount);
}
}
}
/// <summary>
/// Deletes the previous word.
/// </summary>
public static void BackwardDeleteWord(ConsoleKeyInfo? key = null, object arg = null)
{
int qty = arg as int? ?? 1;
int deletePoint = _singleton._current;
for (int i = 0; i < qty; i++)
{
deletePoint = _singleton.ViFindPreviousWordPoint(deletePoint, _singleton.Options.WordDelimiters);
}
if (deletePoint == _singleton._current)
{
Ding();
return;
}
_clipboard.Record(_singleton._buffer, deletePoint, _singleton._current - deletePoint);
_singleton.SaveEditItem(EditItemDelete.Create(
_clipboard,
deletePoint,
BackwardDeleteWord,
arg
));
_singleton._buffer.Remove(deletePoint, _singleton._current - deletePoint);
_singleton._current = deletePoint;
_singleton.Render();
}
/// <summary>
/// Deletes the previous word, using only white space as the word delimiter.
/// </summary>
public static void ViBackwardDeleteGlob(ConsoleKeyInfo? key = null, object arg = null)
{
if (_singleton._current == 0)
{
Ding();
return;
}
int qty = arg as int? ?? 1;
int deletePoint = _singleton._current;
for (int i = 0; i < qty && deletePoint > 0; i++)
{
deletePoint = _singleton.ViFindPreviousGlob(deletePoint - 1);
}
if (deletePoint == _singleton._current)
{
Ding();
return;
}
_clipboard.Record(_singleton._buffer, deletePoint, _singleton._current - deletePoint);
_singleton.SaveEditItem(EditItemDelete.Create(
_clipboard,
deletePoint,
BackwardDeleteWord,
arg
));
_singleton._buffer.Remove(deletePoint, _singleton._current - deletePoint);
_singleton._current = deletePoint;
_singleton.Render();
}
/// <summary>
/// Find the matching brace, paren, or square bracket and delete all contents within, including the brace.
/// </summary>
public static void ViDeleteBrace(ConsoleKeyInfo? key = null, object arg = null)
{
int newCursor = _singleton.ViFindBrace(_singleton._current);
if (_singleton._current < newCursor)
{
DeleteRange(_singleton._current, newCursor, ViDeleteBrace);
}
else if (newCursor < _singleton._current)
{
DeleteRange(newCursor, _singleton._current, ViDeleteBrace);
}
else
{
Ding();
}
}
/// <summary>
/// Delete all characters included in the supplied range.
/// </summary>
/// <param name="first">Index of where to begin the delete.</param>
/// <param name="last">Index of where to end the delete.</param>
/// <param name="action">Action that generated this request, used for repeat command ('.').</param>
private static void DeleteRange(int first, int last, Action<ConsoleKeyInfo?, object> action)
{
int length = last - first + 1;
_singleton.SaveToClipboard(first, length);
_singleton.SaveEditItem(EditItemDelete.Create(_clipboard, first, action));
_singleton._current = first;
_singleton._buffer.Remove(first, length);
_singleton.Render();
}
/// <summary>
/// Prompts for a search string and initiates search upon AcceptLine.
/// </summary>
public static void ViSearchHistoryBackward(ConsoleKeyInfo? key = null, object arg = null)
{
_singleton.SaveCurrentLine();
_singleton.StartSearch(backward: true);
}
/// <summary>
/// Prompts for a search string and initiates search upon AcceptLine.
/// </summary>
public static void SearchForward(ConsoleKeyInfo? key = null, object arg = null)
{
_singleton.SaveCurrentLine();
_singleton.StartSearch(backward: false);
}
/// <summary>
/// Repeat the last search in the same direction as before.
/// </summary>
public static void RepeatSearch(ConsoleKeyInfo? key = null, object arg = null)
{
if (string.IsNullOrEmpty(_singleton._searchHistoryPrefix))
You can’t perform that action at this time.