LeonMMcoset/CMLeonOS
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方向键上下查找历史

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Leonmmcoset
2026-02-06 01:39:18 +08:00
parent 71c8122ce3
commit 82a4177456
1 changed files with 61 additions and 0 deletions
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61
shell/Shell.cs
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@@ -144,6 +144,7 @@ namespace CMLeonOS
int cursorPos = 0; int cursorPos = 0;
int startLine = Console.CursorTop; int startLine = Console.CursorTop;
int startCol = Console.CursorLeft; int startCol = Console.CursorLeft;
int historyIndex = -1;
while (true) while (true)
{ {
@@ -164,6 +165,42 @@ namespace CMLeonOS
cursorPos = input.Length; cursorPos = input.Length;
} }
} }
else if (key.Key == ConsoleKey.UpArrow)
{
if (commandHistory.Count > 0)
{
if (historyIndex < commandHistory.Count - 1)
{
historyIndex++;
string historyCommand = commandHistory[commandHistory.Count - 1 - historyIndex];
ClearCurrentInput(startCol, startLine, input.Length);
Console.Write(historyCommand);
input = historyCommand;
cursorPos = input.Length;
}
}
}
else if (key.Key == ConsoleKey.DownArrow)
{
if (historyIndex > 0)
{
historyIndex--;
string historyCommand = commandHistory[commandHistory.Count - 1 - historyIndex];
ClearCurrentInput(startCol, startLine, input.Length);
Console.Write(historyCommand);
input = historyCommand;
cursorPos = input.Length;
}
else if (historyIndex == 0)
{
historyIndex = -1;
ClearCurrentInput(startCol, startLine, input.Length);
input = "";
cursorPos = 0;
}
}
else if (key.Key == ConsoleKey.Backspace) else if (key.Key == ConsoleKey.Backspace)
{ {
if (cursorPos > 0) if (cursorPos > 0)
@@ -182,6 +219,7 @@ namespace CMLeonOS
{ {
input = ""; input = "";
cursorPos = 0; cursorPos = 0;
historyIndex = -1;
Console.SetCursorPosition(startCol, startLine); Console.SetCursorPosition(startCol, startLine);
Console.Write(new string(' ', Console.WindowWidth - startCol)); Console.Write(new string(' ', Console.WindowWidth - startCol));
Console.SetCursorPosition(startCol, startLine); Console.SetCursorPosition(startCol, startLine);
@@ -192,10 +230,33 @@ namespace CMLeonOS
input = input.Substring(0, cursorPos) + key.KeyChar + input.Substring(cursorPos); input = input.Substring(0, cursorPos) + key.KeyChar + input.Substring(cursorPos);
cursorPos++; cursorPos++;
Console.Write(key.KeyChar); Console.Write(key.KeyChar);
historyIndex = -1;
} }
} }
} }
private void ClearCurrentInput(int startCol, int startLine, int length)
{
int currentLine = startLine;
int currentCol = startCol;
int remaining = length;
while (remaining > 0)
{
int spaceInLine = Console.WindowWidth - currentCol;
int toClear = Math.Min(remaining, spaceInLine);
Console.SetCursorPosition(currentCol, currentLine);
Console.Write(new string(' ', toClear));
remaining -= toClear;
currentLine++;
currentCol = 0;
}
Console.SetCursorPosition(startCol, startLine);
}
private string AutoComplete(string input) private string AutoComplete(string input)
{ {
if (string.IsNullOrWhiteSpace(input)) if (string.IsNullOrWhiteSpace(input))