private bool backspaceOrForwardDelete(android.view.View view, android.text.Editable
content, int keyCode, android.view.KeyEvent @event, bool isForwardDelete)
{
// Ensure the key event does not have modifiers except ALT or SHIFT.
if (!android.view.KeyEvent.metaStateHasNoModifiers(@event.getMetaState() & ~(android.view.KeyEvent
.META_SHIFT_MASK | android.view.KeyEvent.META_ALT_MASK)))
{
return(false);
}
// If there is a current selection, delete it.
if (deleteSelection(view, content))
{
return(true);
}
// Alt+Backspace or Alt+ForwardDelete deletes the current line, if possible.
if (@event.isAltPressed() || getMetaState(content, META_ALT_ON) == 1)
{
if (deleteLine(view, content))
{
return(true);
}
}
// Delete a character.
int start = android.text.Selection.getSelectionEnd(content);
int end;
if (isForwardDelete || @event.isShiftPressed() || getMetaState(content, META_SHIFT_ON
) == 1)
{
end = android.text.TextUtils.getOffsetAfter(content, start);
}
else
{
end = android.text.TextUtils.getOffsetBefore(content, start);
}
if (start != end)
{
content.delete(System.Math.Min(start, end), System.Math.Max(start, end));
return(true);
}
return(false);
}