public override void HandleKeyDown(UIKeyEventArgs e)
{
this.SetCaretVisible(true);
if (!e.HasKeyData)
{
return;
}
switch (e.KeyCode)
{
case UIKeys.Home:
{
this.DoHome(e.Shift);
}
break;
case UIKeys.End:
{
this.DoEnd(e.Shift);
}
break;
case UIKeys.Back:
{
if (_isEditable)
{
if (_editSession.SelectionRange != null)
{
InvalidateGraphicOfCurrentSelectionArea();
}
else
{
InvalidateGraphicOfCurrentLineArea();
}
if (_textSurfaceEventListener == null)
{
_editSession.DoBackspace();
}
else
{
if (!TextSurfaceEventListener.NotifyPreviewBackSpace(_textSurfaceEventListener, e) &&
_editSession.DoBackspace())
{
TextSurfaceEventListener.NotifyCharactersRemoved(_textSurfaceEventListener,
new TextDomEventArgs(_editSession._updateJustCurrentLine));
}
}
EnsureCaretVisible();
}
}
break;
case UIKeys.Delete:
{
if (_isEditable)
{
if (_editSession.SelectionRange != null)
{
InvalidateGraphicOfCurrentSelectionArea();
}
else
{
InvalidateGraphicOfCurrentLineArea();
}
if (_textSurfaceEventListener == null)
{
_editSession.DoDelete();
}
else
{
VisualSelectionRangeSnapShot delpart = _editSession.DoDelete();
TextSurfaceEventListener.NotifyCharactersRemoved(_textSurfaceEventListener,
new TextDomEventArgs(_editSession._updateJustCurrentLine, delpart));
}
EnsureCaretVisible();
}
}
break;
default:
{
if (_textSurfaceEventListener != null)
{
UIKeys keycode = e.KeyCode;
if (keycode >= UIKeys.F1 && keycode <= UIKeys.F12)
{
InvalidateGraphicOfCurrentSelectionArea();
TextSurfaceEventListener.NotifyFunctionKeyDown(_textSurfaceEventListener, keycode);
EnsureCaretVisible();
}
}
}
break;
}
if (e.HasKeyData && e.Ctrl)
{
switch (e.KeyCode)
{
case UIKeys.A:
{
//select all
//....
this.CurrentLineNumber = 0;
//start select to end
DoHome(false); //1st simulate
DoHome(true); //2nd
this.CurrentLineNumber = this.LineCount - 1;
DoEnd(true); //
}
break;
case UIKeys.C:
{
using (StringBuilderPool <TempTextLineCopyContext> .GetFreeStringBuilder(out StringBuilder stBuilder))
{
_editSession.CopySelectedTextToPlainText(stBuilder);
if (stBuilder != null)
{
if (stBuilder.Length == 0)
{
Clipboard.Clear();
}
else
{
Clipboard.SetText(stBuilder.ToString());
}
}
}
}
break;
case UIKeys.V:
{
if (_isEditable && Clipboard.ContainsUnicodeText())
{
//1. we need to parse multi-line to single line
//this may need text-break services
_editSession.AddTextToCurrentLine(PlainTextDocumentHelper.CreatePlainTextDocument(Clipboard.GetUnicodeText()));
EnsureCaretVisible();
}
}
break;
case UIKeys.X:
{
if (_isEditable && _editSession.SelectionRange != null)
{
InvalidateGraphicOfCurrentSelectionArea();
using (StringBuilderPool <TempTextLineCopyContext> .GetFreeStringBuilder(out StringBuilder stBuilder))
{
_editSession.CopySelectedTextToPlainText(stBuilder);
if (stBuilder != null)
{
Clipboard.SetText(stBuilder.ToString());
}
_editSession.DoDelete();
EnsureCaretVisible();
}
}
}
break;
case UIKeys.Z:
{
if (_isEditable)
{
_editSession.UndoLastAction();
EnsureCaretVisible();
}
}
break;
case UIKeys.Y:
{
if (_isEditable)
{
_editSession.ReverseLastUndoAction();
EnsureCaretVisible();
}
}
break;
}
}
if (_textSurfaceEventListener != null)
{
TextSurfaceEventListener.NotifyKeyDown(_textSurfaceEventListener, e);
}
}