mahalex/MParser
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Support PgUp/PgDn

Browse Source
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
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
MApplication/DisplayTextViewPort.cs
View File

@ -134,8 +134,8 @@ namespace MApplication
_ when CursorRelativeLine == Height - 1 => _ when CursorRelativeLine == Height - 1 =>
With( With(
out changed1, out changed1,
startingLine: Math.Min(CursorAbsoluteLine + 1, Text.Lines.Count) - Height + 1, startingLine: Math.Min(CursorAbsoluteLine + 1, Text.Lines.Count - 1) - Height + 1,
cursorAbsoluteLine: Math.Min(CursorAbsoluteLine + 1, Text.Lines.Count)), cursorAbsoluteLine: Math.Min(CursorAbsoluteLine + 1, Text.Lines.Count - 1)),
_ => With( _ => With(
out changed1, out changed1,
cursorAbsoluteLine: CursorAbsoluteLine + 1), cursorAbsoluteLine: CursorAbsoluteLine + 1),
@ -145,6 +145,28 @@ namespace MApplication
return result; 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) public DisplayTextViewPort CursorHome(out bool needsRedraw)
{ {
return With( return With(

39
MApplication/Program.cs
View File

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