如何获取 EnvDte.ActiveDocument 的 IWpfTextView？

我正在尝试操纵 Visual Studio 文本编辑器滚动条值。问题是我只有 dte.ActiveDocument 并且无法从那里执行此操作。

当 VS 启动并且我捕获 dte.Events.CommandEvents 时，我的扩展仅加载一次。有时我想更改 ActiveDocument 的滚动条值。为此，我需要 IWpfTextView 或 ITextView。您知道如何获取该对象的实例吗？

internal class MyExtension
    {
        private CommandEvents commandEvents;

        private DTE dte;

        public MyExtension(DTE dte)
        {
            this.dte = dte;
            commandEvents = dte.Events.CommandEvents;
            commandEvents.BeforeExecute += commandEvents_BeforeExecute;
        }

        void commandEvents_BeforeExecute(string Guid, int ID, object CustomIn, object CustomOut, ref bool CancelDefault)
        {
            var doc = dte.ActiveDocument
            // CHANGE SCROLLBAR VALUES HERE
        }
    }

我找到了一种方法来做到这一点。在扩展的主类中我得到 SVsTextManager

public sealed class MyExtensionPackage : Package
{
    protected override void Initialize()
    {
        DTE dte = (DTE)base.GetService(typeof(DTE));
        var txtMgr = (IVsTextManager)base.GetService(typeof(SVsTextManager));
        plugin = new MyExtension(dte, txtMgr);
        base.Initialize();
    }
}

internal class MyExtension
    {
        private CommandEvents commandEvents;

        private DTE dte;
        private IVsTextManager txtMngr;

        public MyExtension(DTE dte, IVsTextManager txtMngr)
        {
            this.txtMngr = txtMngr;
            this.dte = dte;
            commandEvents = dte.Events.CommandEvents;
            commandEvents.BeforeExecute += commandEvents_BeforeExecute;
        }

        void commandEvents_BeforeExecute(string Guid, int ID, object CustomIn, object CustomOut, ref bool CancelDefault)
        {
            var doc = dte.ActiveDocument

            IVsTextView textViewCurrent;
            txtMngr.GetActiveView(1, null, out textViewCurrent);
            int a, b, c, verticalScrollPosition;

            var scrollInfo = textViewCurrent.GetScrollInfo(1, out a, out b, out c, out verticalScrollPosition);
            textViewCurrent.SetScrollPosition(1, verticalScrollPosition);
        }
    }