Bloom.Edit.EditingModel.OnTabAboutToChange C# (CSharp) Method

        private void OnTabAboutToChange(TabChangedDetails details)
        {
            if (details.From == _view)
            {
                SaveNow();
                _view.RunJavaScript("if (typeof(FrameExports) !=='undefined') {FrameExports.getPageFrameExports().disconnectForGarbageCollection();}");
                // This bizarre behavior prevents BL-2313 and related problems.
                // For some reason I cannot discover, switching tabs when focus is in the Browser window
                // causes Bloom to get deactivated, which prevents various controls from working.
                // Moreover, it seems (BL-2329) that if the user types Alt-F4 while whatever-it-is is active,
                // things get into a very bad state indeed. So arrange to re-activate ourselves as soon as the dust settles.
                _oldActiveForm = Form.ActiveForm;
                Application.Idle += ReactivateFormOnIdle;
                //note: if they didn't actually change anything, Chorus is not going to actually do a checkin, so this
                //won't pollute the history
                #if Chorus
                    _sendReceiver.CheckInNow(string.Format("Edited '{0}'", CurrentBook.TitleBestForUserDisplay));
                #endif
            }
        }