Method checkRoladFile

src/cceditor/ccnotepad.cpp:3641–3716

startReadSize == -1 则从头开始读取。否则从startReadSize开始

//startReadSize == -1 则从头开始读取。否则从startReadSize开始
bool CCNotePad::checkRoladFile(ScintillaEditView* pEdit, qint64 startReadSize)
{
	if (pEdit != nullptr && pEdit->property(Modify_Outside).toBool())
	{
		//防止该函数重入，导致时序错误
		if (m_isInReloadFile)
		{
			return false;
		}

		m_isInReloadFile = true;

		int tailStatus = getFileTailProperty(pEdit);

		if (tailStatus != 1)
		{
			QApplication::beep();
		}

		//如果是开启了taif，则不提示，直接重新加载文件
		if (tailStatus == 1)
		{
			//如果是进入tailf模式，但是startReadSize == -1.则什么也不干。
			//等监控超时后，后续走tailf差异读取模式。
			if (startReadSize == -1)
			{
				//这里什么也不做。坐等超时后，走下面的逻辑
		}
		else
		{
				//如果文件大于3000行，则删除内容，只保留当前100行，继续tailf
				if (pEdit->lines() < 3000)
				{
					doReloadTxtFile(pEdit, true, startReadSize);
				}
				else
				{
					firstTimeIntoTail(pEdit,100);
				}
				
			}

		}
		else 
		{
			QString filePath = pEdit->property(Edit_View_FilePath).toString();

			int ret = QMessageBox::question(this, tr("Reload"), tr("\"%1\" This file has been modified by another program. Do you want to reload it?").arg(filePath), tr("Yes[Reload]"), tr("No[Drop]"), tr("On Tailf"));
			if(ret == 0)
			{
				doReloadTxtFile(pEdit, false, startReadSize);
			}
			else if (ret == 1)
			{
				//放弃
			pEdit->setProperty(Modify_Outside, QVariant(false));
		}
			else if (ret == 2)