using PaintDotNet.Measurement.HistoryMementos;

namespace PaintDotNet.Measurement.HistoryFunctions
{
    public sealed class AddNewBlankLayerFunction : HistoryFunction
    {
        public override HistoryMemento OnExecute(IDocumentWorkspace historyWorkspace)
        {
            BitmapLayer newLayer = null;
            newLayer = new BitmapLayer(historyWorkspace.GetDocument().Width, historyWorkspace.GetDocument().Height);
            string newLayerNameFormat = PdnResources.GetString("AddNewBlankLayer.LayerName.Format");
            newLayer.Name = string.Format(newLayerNameFormat, (1 + historyWorkspace.GetDocument().Layers.Count).ToString());
            newLayer.Opacity = 0;
            int newLayerIndex = historyWorkspace.GetActiveLayerIndex() + 1;

            NewLayerHistoryMemento ha = new NewLayerHistoryMemento(
                PdnResources.GetString("AddNewBlankLayer.HistoryMementoName"),
                PdnResources.GetImageResource("Icons.MenuLayersAddNewLayerIcon.png"),
                historyWorkspace,
                newLayerIndex);

            EnterCriticalRegion();

            historyWorkspace.GetDocument().Layers.Insert(newLayerIndex, newLayer);

            return ha;
        }

        public AddNewBlankLayerFunction()
            : base(PaintDotNet.Measurement.Enum.ActionFlags.None)
        {
        }
    }
}