public void OnBeforeContextMenu(TModel model, Context context)
{
for (int i = modelAdapter.GetItemCount(model) - 1; i >= 0; i--)
{
int command = modelAdapter.GetCommandAt(model, i);
if (!(AllowedCommands.Contains(command) || command is >= CommandCustomFirst and <= CommandCustomLast))
{
modelAdapter.RemoveAt(model, i);
}
}
for (int i = modelAdapter.GetItemCount(model) - 2; i >= 0; i--)
{
if (modelAdapter.IsSeparatorAt(model, i) && modelAdapter.IsSeparatorAt(model, i + 1))
{
modelAdapter.RemoveAt(model, i);
}
}
if (modelAdapter.GetItemCount(model) > 0 && modelAdapter.IsSeparatorAt(model, 0))
{
modelAdapter.RemoveAt(model, 0);
}
var builder = new ContextMenuBuilder(modelAdapter, actionRegistry, model);
builder.AddSeparator();
handler?.Show(builder, context);
builder.RemoveSeparatorIfLast(model);
}