Bloom.Browser.UpdateEditButtons C# (CSharp) Method

        public void UpdateEditButtons()
        {
            if (_copyCommand == null)
                return;

            if (InvokeRequired)
            {
                Invoke(new Action(UpdateEditButtons));
                return;
            }

            try
            {
                // BL-3658 GeckoFx-45 has a bug in the CanXSelection Properties, they always return 'true'
                // Tom Hindle suggested a workaround that seems to work.
                var isTextSelection = IsThereACurrentTextSelection();
                _cutCommand.Enabled = _browser != null && isTextSelection;
                _copyCommand.Enabled = _browser != null && isTextSelection;
                //_cutCommand.Enabled = _browser != null && _browser.CanCutSelection;
                //_copyCommand.Enabled = _browser != null && _browser.CanCopySelection;
                _pasteCommand.Enabled = _browser != null && _browser.CanPaste;
                if (_pasteCommand.Enabled)
                {
                    //prevent pasting images (BL-93)
                    _pasteCommand.Enabled = PortableClipboard.ContainsText();
                }
                _undoCommand.Enabled = CanUndo;

            }
            catch (Exception)
            {
                _pasteCommand.Enabled = false;
                Logger.WriteMinorEvent("UpdateEditButtons(): Swallowed exception.");
                //REf jira.palaso.org/issues/browse/BL-197
                //I saw this happen when Bloom was in the background, with just normal stuff on the clipboard.
                //so it's probably just not ok to check if you're not front-most.
            }
        }