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

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

namespace ShrlAlgoToolkit.RevitCore.Assists;

/// <summary>
///     获取当前模型或链接模型的实体元素
/// </summary>
public class ElementInLinkOrCurrentDocument : ISelectionFilter
{
    public ElementInLinkOrCurrentDocument(Document doc)
    {
        this.doc = doc;
    }

    private readonly Document doc;

    public bool LastCheckedWasFromLink => null != LinkedDocument;

    public Document LinkedDocument { get; private set; }

    public bool AllowElement(Element e)
    {
        return true;
    }

    public bool AllowReference(Reference r, XYZ p)
    {
        LinkedDocument = null;

        var e = doc.GetElement(r);

        if (e is RevitLinkInstance li)
        {
            LinkedDocument = li.GetLinkDocument();

            e = LinkedDocument.GetElement(r.LinkedElementId);
        }

        return e != null
               && e.CanHaveTypeAssigned()
               && e.HasPhases()
               && e.get_BoundingBox(null) != null
               && e.Category is { Parent: null }
               && e is not Panel;
    }
}