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This commit is contained in:
Alexander Luzgarev 2020-07-14 11:52:27 +02:00
parent a7207aaab1
commit 57486aac9c
2 changed files with 38 additions and 27 deletions
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26
MApplication/DisplayTextViewPort.cs
View File

@ -134,8 +134,8 @@ namespace MApplication
_ when CursorRelativeLine == Height - 1 =>
With(
out changed1,
startingLine: Math.Min(CursorAbsoluteLine + 1, Text.Lines.Count) - Height + 1,
cursorAbsoluteLine: Math.Min(CursorAbsoluteLine + 1, Text.Lines.Count)),
startingLine: Math.Min(CursorAbsoluteLine + 1, Text.Lines.Count - 1) - Height + 1,
cursorAbsoluteLine: Math.Min(CursorAbsoluteLine + 1, Text.Lines.Count - 1)),
_ => With(
out changed1,
cursorAbsoluteLine: CursorAbsoluteLine + 1),
@ -145,6 +145,28 @@ namespace MApplication
return result;
}
internal DisplayTextViewPort PageDown(out bool needsRedraw)
{
var result1 = With(
out var changed1,
startingLine: Math.Min(StartingLine + Height, Text.Lines.Count - 1),
cursorAbsoluteLine: Math.Min(CursorAbsoluteLine + Height, Text.Lines.Count - 1));
var result = result1.SnapToLine(out var changed2);
needsRedraw = changed1 || changed2;
return result;
}
internal DisplayTextViewPort PageUp(out bool needsRedraw)
{
var result1 = With(
out var changed1,
startingLine: Math.Max(StartingLine - Height, 0),
cursorAbsoluteLine: Math.Max(CursorAbsoluteLine - Height, 0));
var result = result1.SnapToLine(out var changed2);
needsRedraw = changed1 || changed2;
return result;
}
public DisplayTextViewPort CursorHome(out bool needsRedraw)
{
return With(

39
MApplication/Program.cs
View File

@ -47,35 +47,24 @@ namespace MApplication
_outputView.MoveCursorTo(viewPort.CursorRelativeColumn, viewPort.CursorRelativeLine);
var key = Console.ReadKey(intercept: true);
switch (key.Key)
viewPort = key.Key switch
{
case ConsoleKey.LeftArrow:
viewPort = viewPort.CursorLeft(out needsRedraw);
break;
case ConsoleKey.RightArrow:
viewPort = viewPort.CursorRight(out needsRedraw);
break;
case ConsoleKey.UpArrow:
viewPort = viewPort.CursorUp(out needsRedraw);
break;
case ConsoleKey.DownArrow:
viewPort = viewPort.CursorDown(out needsRedraw);
break;
case ConsoleKey.Home:
viewPort = viewPort.CursorHome(out needsRedraw);
break;
case ConsoleKey.End:
viewPort = viewPort.CursorEnd(out needsRedraw);
break;
ConsoleKey.LeftArrow => viewPort.CursorLeft(out needsRedraw),
ConsoleKey.RightArrow => viewPort.CursorRight(out needsRedraw),
ConsoleKey.UpArrow => viewPort.CursorUp(out needsRedraw),
ConsoleKey.DownArrow => viewPort.CursorDown(out needsRedraw),
ConsoleKey.Home => viewPort.CursorHome(out needsRedraw),
ConsoleKey.End => viewPort.CursorEnd(out needsRedraw),
ConsoleKey.PageUp => viewPort.PageUp(out needsRedraw),
ConsoleKey.PageDown => viewPort.PageDown(out needsRedraw),
_ => viewPort,
};
if (key.Key == ConsoleKey.Q)
{
return;
}
}
}
}
class Program