Shrlalgo.RvKits/ShrlAlgoToolkit.RevitCore/Assists/EnableInViewPlan.cs

using Autodesk.Revit.DB;
using Autodesk.Revit.UI;

namespace ShrlAlgoToolkit.RevitCore.Assists;

/// <summary>
///     命令在平面视图可用
/// </summary>
public class EnableInViewPlan : IExternalCommandAvailability
{
    public bool IsCommandAvailable(UIApplication applicationData, CategorySet selectedCategories)
    {
        return applicationData.ActiveUIDocument?.Document.ActiveView is ViewPlan
               && applicationData.ActiveUIDocument?.Document.IsFamilyDocument == false;
    }
}