OpenTween.TweenMain.SearchButton_Click C# (CSharp) Method

        private void SearchButton_Click(object sender, EventArgs e)
        {
            //公式検索
            Control pnl = ((Control)sender).Parent;
            if (pnl == null) return;
            string tbName = pnl.Parent.Text;
            var tb = (PublicSearchTabModel)_statuses.Tabs[tbName];
            ComboBox cmb = (ComboBox)pnl.Controls["comboSearch"];
            ComboBox cmbLang = (ComboBox)pnl.Controls["comboLang"];
            cmb.Text = cmb.Text.Trim();
            // 検索式演算子 OR についてのみ大文字しか認識しないので強制的に大文字とする
            bool Quote = false;
            StringBuilder buf = new StringBuilder();
            char[] c = cmb.Text.ToCharArray();
            for (int cnt = 0; cnt < cmb.Text.Length; cnt++)
            {
                if (cnt > cmb.Text.Length - 4)
                {
                    buf.Append(cmb.Text.Substring(cnt));
                    break;
                }
                if (c[cnt] == '"')
                {
                    Quote = !Quote;
                }
                else
                {
                    if (!Quote && cmb.Text.Substring(cnt, 4).Equals(" or ", StringComparison.OrdinalIgnoreCase))
                    {
                        buf.Append(" OR ");
                        cnt += 3;
                        continue;
                    }
                }
                buf.Append(c[cnt]);
            }
            cmb.Text = buf.ToString();

            var listView = (DetailsListView)pnl.Parent.Tag;

            var queryChanged = tb.SearchWords != cmb.Text || tb.SearchLang != cmbLang.Text;

            tb.SearchWords = cmb.Text;
            tb.SearchLang = cmbLang.Text;
            if (string.IsNullOrEmpty(cmb.Text))
            {
                listView.Focus();
                SaveConfigsTabs();
                return;
            }
            if (queryChanged)
            {
                int idx = cmb.Items.IndexOf(tb.SearchWords);
                if (idx > -1) cmb.Items.RemoveAt(idx);
                cmb.Items.Insert(0, tb.SearchWords);
                cmb.Text = tb.SearchWords;
                cmb.SelectAll();
                this.PurgeListViewItemCache();
                listView.VirtualListSize = 0;
                _statuses.ClearTabIds(tbName);
                SaveConfigsTabs();   //検索条件の保存
            }

            this.GetPublicSearchAsync(tb);
            listView.Focus();
        }