OpenTween.TweenMain.ContextMenuOperate_Opening C# (CSharp) Method

        private void ContextMenuOperate_Opening(object sender, CancelEventArgs e)
        {
            if (ListTab.SelectedTab == null) return;
            if (_statuses == null || _statuses.Tabs == null || !_statuses.Tabs.ContainsKey(ListTab.SelectedTab.Text)) return;
            if (!this.ExistCurrentPost)
            {
                ReplyStripMenuItem.Enabled = false;
                ReplyAllStripMenuItem.Enabled = false;
                DMStripMenuItem.Enabled = false;
                ShowProfileMenuItem.Enabled = false;
                ShowUserTimelineContextMenuItem.Enabled = false;
                ListManageUserContextToolStripMenuItem2.Enabled = false;
                MoveToFavToolStripMenuItem.Enabled = false;
                TabMenuItem.Enabled = false;
                IDRuleMenuItem.Enabled = false;
                SourceRuleMenuItem.Enabled = false;
                ReadedStripMenuItem.Enabled = false;
                UnreadStripMenuItem.Enabled = false;
            }
            else
            {
                ShowProfileMenuItem.Enabled = true;
                ListManageUserContextToolStripMenuItem2.Enabled = true;
                ReplyStripMenuItem.Enabled = true;
                ReplyAllStripMenuItem.Enabled = true;
                DMStripMenuItem.Enabled = true;
                ShowUserTimelineContextMenuItem.Enabled = true;
                MoveToFavToolStripMenuItem.Enabled = true;
                TabMenuItem.Enabled = true;
                IDRuleMenuItem.Enabled = true;
                SourceRuleMenuItem.Enabled = true;
                ReadedStripMenuItem.Enabled = true;
                UnreadStripMenuItem.Enabled = true;
            }
            if (_statuses.Tabs[ListTab.SelectedTab.Text].TabType == MyCommon.TabUsageType.DirectMessage || !this.ExistCurrentPost || _curPost.IsDm)
            {
                FavAddToolStripMenuItem.Enabled = false;
                FavRemoveToolStripMenuItem.Enabled = false;
                StatusOpenMenuItem.Enabled = false;
                FavorareMenuItem.Enabled = false;
                ShowRelatedStatusesMenuItem.Enabled = false;

                ReTweetStripMenuItem.Enabled = false;
                ReTweetUnofficialStripMenuItem.Enabled = false;
                QuoteStripMenuItem.Enabled = false;
                FavoriteRetweetContextMenu.Enabled = false;
                FavoriteRetweetUnofficialContextMenu.Enabled = false;
            }
            else
            {
                FavAddToolStripMenuItem.Enabled = true;
                FavRemoveToolStripMenuItem.Enabled = true;
                StatusOpenMenuItem.Enabled = true;
                FavorareMenuItem.Enabled = true;
                ShowRelatedStatusesMenuItem.Enabled = true;  //PublicSearchの時問題出るかも

                if (!_curPost.CanRetweetBy(this.twitterApi.CurrentUserId))
                {
                    ReTweetStripMenuItem.Enabled = false;
                    ReTweetUnofficialStripMenuItem.Enabled = false;
                    QuoteStripMenuItem.Enabled = false;
                    FavoriteRetweetContextMenu.Enabled = false;
                    FavoriteRetweetUnofficialContextMenu.Enabled = false;
                }
                else
                {
                    ReTweetStripMenuItem.Enabled = true;
                    ReTweetUnofficialStripMenuItem.Enabled = true;
                    QuoteStripMenuItem.Enabled = true;
                    FavoriteRetweetContextMenu.Enabled = true;
                    FavoriteRetweetUnofficialContextMenu.Enabled = true;
                }
            }
            //if (_statuses.Tabs[ListTab.SelectedTab.Text].TabType != MyCommon.TabUsageType.Favorites)
            //{
            //    RefreshMoreStripMenuItem.Enabled = true;
            //}
            //else
            //{
            //    RefreshMoreStripMenuItem.Enabled = false;
            //}
            if (!this.ExistCurrentPost
                || _curPost.InReplyToStatusId == null)
            {
                RepliedStatusOpenMenuItem.Enabled = false;
            }
            else
            {
                RepliedStatusOpenMenuItem.Enabled = true;
            }
            if (!this.ExistCurrentPost || string.IsNullOrEmpty(_curPost.RetweetedBy))
            {
                MoveToRTHomeMenuItem.Enabled = false;
            }
            else
            {
                MoveToRTHomeMenuItem.Enabled = true;
            }

            if (this.ExistCurrentPost)
            {
                this.DeleteStripMenuItem.Enabled = this._curPost.CanDeleteBy(this.tw.UserId);
                if (this._curPost.RetweetedByUserId == this.tw.UserId)
                    this.DeleteStripMenuItem.Text = Properties.Resources.DeleteMenuText2;
                else
                    this.DeleteStripMenuItem.Text = Properties.Resources.DeleteMenuText1;
            }
        }