OpenTween.TweenMain.PostButton_Click C# (CSharp) Method

        private async void PostButton_Click(object sender, EventArgs e)
        {
            if (StatusText.Text.Trim().Length == 0)
            {
                if (!ImageSelector.Enabled)
                {
                    await this.DoRefresh();
                    return;
                }
            }

            if (this.ExistCurrentPost && StatusText.Text.Trim() == string.Format("RT @{0}: {1}", _curPost.ScreenName, _curPost.TextFromApi))
            {
                DialogResult rtResult = MessageBox.Show(string.Format(Properties.Resources.PostButton_Click1, Environment.NewLine),
                                                               "Retweet",
                                                               MessageBoxButtons.YesNoCancel,
                                                               MessageBoxIcon.Question);
                switch (rtResult)
                {
                    case DialogResult.Yes:
                        StatusText.Text = "";
                        await this.doReTweetOfficial(false);
                        return;
                    case DialogResult.Cancel:
                        return;
                }
            }

            var inReplyToStatusId = this.inReplyTo?.Item1;
            var inReplyToScreenName = this.inReplyTo?.Item2;
            _history[_history.Count - 1] = new PostingStatus(StatusText.Text, inReplyToStatusId, inReplyToScreenName);

            if (this._cfgCommon.Nicoms)
            {
                StatusText.SelectionStart = StatusText.Text.Length;
                await UrlConvertAsync(MyCommon.UrlConverter.Nicoms);
            }
            //if (SettingDialog.UrlConvertAuto)
            //{
            //    StatusText.SelectionStart = StatusText.Text.Length;
            //    UrlConvertAutoToolStripMenuItem_Click(null, null);
            //}
            //else if (SettingDialog.Nicoms)
            //{
            //    StatusText.SelectionStart = StatusText.Text.Length;
            //    UrlConvert(UrlConverter.Nicoms);
            //}
            StatusText.SelectionStart = StatusText.Text.Length;
            CheckReplyTo(StatusText.Text);

            var statusText = this.FormatStatusText(this.StatusText.Text);

            if (this.GetRestStatusCount(statusText) < 0)
            {
                // 文字数制限を超えているが強制的に投稿するか
                var ret = MessageBox.Show(Properties.Resources.PostLengthOverMessage1, Properties.Resources.PostLengthOverMessage2, MessageBoxButtons.OKCancel, MessageBoxIcon.Question, MessageBoxDefaultButton.Button2);
                if (ret != DialogResult.OK)
                    return;
            }

            var status = new PostingStatus();
            status.status = statusText;

            status.inReplyToId = this.inReplyTo?.Item1;
            status.inReplyToName = this.inReplyTo?.Item2;
            if (ImageSelector.Visible)
            {
                //画像投稿
                if (!ImageSelector.TryGetSelectedMedia(out status.imageService, out status.mediaItems))
                    return;
            }

            this.inReplyTo = null;
            StatusText.Text = "";
            _history.Add(new PostingStatus());
            _hisIdx = _history.Count - 1;
            if (!ToolStripFocusLockMenuItem.Checked)
                ((Control)ListTab.SelectedTab.Tag).Focus();
            urlUndoBuffer = null;
            UrlUndoToolStripMenuItem.Enabled = false;  //Undoをできないように設定

            //Google検索（試験実装）
            if (StatusText.Text.StartsWith("Google:", StringComparison.OrdinalIgnoreCase) && StatusText.Text.Trim().Length > 7)
            {
                string tmp = string.Format(Properties.Resources.SearchItem2Url, Uri.EscapeDataString(StatusText.Text.Substring(7)));
                await this.OpenUriInBrowserAsync(tmp);
            }

            await this.PostMessageAsync(status);
        }