//-------------------------------------------------------------------------------------
void TelnetHandler::sendNewLine()
{
std::string startstr = getInputStartString();
pEndPoint_->send(startstr.c_str(), startstr.size());
resetStartPosition();
currPos_ = 0;
}
//-------------------------------------------------------------------------------------
void TelnetHandler::sendDelChar()
{
if(command_.size() > 0)
{
if(currPos_ > 0)
{
command_.erase(currPos_ - 1, 1);
currPos_--;
pEndPoint_->send(TELNET_CMD_DEL, strlen(TELNET_CMD_DEL));
}
}
else
{
resetStartPosition();
}
}
//-------------------------------------------------------------------------------------
bool TelnetHandler::checkUDLR(const std::string &cmd)
{
if (cmd.find(TELNET_CMD_UP) != std::string::npos) // 上
{
pEndPoint_->send(TELNET_CMD_MOVE_FOCUS_LEFT_MAX, strlen(TELNET_CMD_MOVE_FOCUS_LEFT_MAX));
sendDelChar();
std::string startstr = getInputStartString();
pEndPoint_->send(startstr.c_str(), startstr.size());
resetStartPosition();
if(!getingHistroyCmd_)
{
++historyCommandIndex_;
getingHistroyCmd_ = true;
}
std::string s = getHistoryCommand(false);
pEndPoint_->send(s.c_str(), s.size());
command_ = s;
currPos_ = s.size();
return true;
}
else if (cmd.find(TELNET_CMD_DOWN) != std::string::npos) // 下
{
pEndPoint_->send(TELNET_CMD_MOVE_FOCUS_LEFT_MAX, strlen(TELNET_CMD_MOVE_FOCUS_LEFT_MAX));
sendDelChar();
std::string startstr = getInputStartString();
pEndPoint_->send(startstr.c_str(), startstr.size());
resetStartPosition();
if(!getingHistroyCmd_)
{
--historyCommandIndex_;
getingHistroyCmd_ = true;
}
std::string s = getHistoryCommand(true);
pEndPoint_->send(s.c_str(), s.size());
command_ = s;
currPos_ = s.size();
return true;
}
else if (cmd.find(TELNET_CMD_RIGHT) != std::string::npos) // 右
{
int cmdlen = strlen(TELNET_CMD_RIGHT);
if(currPos_ < (int)command_.size())
{
currPos_++;
pEndPoint_->send(TELNET_CMD_RIGHT, cmdlen);
}
return true;
}
else if (cmd.find(TELNET_CMD_LEFT) != std::string::npos) // 左
{
int cmdlen = strlen(TELNET_CMD_LEFT);
if(currPos_ > 0)
{
currPos_--;
pEndPoint_->send(TELNET_CMD_LEFT, cmdlen);
}
return true;
}
else if (cmd.find(TELNET_CMD_HOME) != std::string::npos) // 移动到行首
{
if (currPos_ > 0)
{
std::string cmdstr = fmt::format("\033[{}D", currPos_);
pEndPoint_->send(cmdstr.c_str(), cmdstr.length());
currPos_ = 0;
}
return true;
}
else if (cmd.find(TELNET_CMD_END) != std::string::npos) // 移动到行尾
{
if (currPos_ != (int32)command_.length())
{
std::string cmdstr = fmt::format("\033[{}C", command_.length() - currPos_);
pEndPoint_->send(cmdstr.c_str(), cmdstr.length());
currPos_ = command_.length();
}
return true;
}
return false;
}
//-------------------------------------------------------------------------------------
void TelnetHandler::onRecvInput(const char *buffer, int size)
{
int idx = 0;
while (idx < size)
{
char c = buffer[idx++];
switch(c)
{
case '\r':
getingHistroyCmd_ = false;
if (idx < size)
{
int cc = buffer[idx++];
if(cc == '\n')
{
if(!processCommand())
return;
}
}
break;
case 8: // 退格
if (currPos_ == 0)
{
resetStartPosition();
}
else
{
sendDelChar();
checkAfterStr();
}
break;
case 27: // vt100命令码: 0x1b
{
std::string s = "";
std::string vt100cmd(s + c);
bool shouldBeContinue = true;
while (shouldBeContinue && idx < size)
{
if (buffer[idx] == '\r')
break;
c = buffer[idx++];
vt100cmd.append(s + c);
switch (c)
{
case 'A': // 光标上移n行
case 'B': // 光标下移n行
case 'C': // 光标右移n列
case 'D': // 光标左移n列
case '~': // home、end等
shouldBeContinue = false;
break;
case 'm': // 颜色等属性或命令
case 'J': // 清屏
case 'K': // 清除从光标到行尾的内容
case 's': // 保存光标位置
case 'u': // 恢复光标位置
case 'l': // 隐藏光标
case 'h': // 显示光标
case 'H': // 设置光标位置
default:
break;
}
}
if (!checkUDLR(vt100cmd))
{
// 把不认识的命令原样输出,但会把命令符改成“^”
// 以避免客户端触发命令操作
vt100cmd[0] = '^';
command_.insert(currPos_, vt100cmd);
currPos_ += vt100cmd.length();
if (currPos_ == (int32)command_.length())
{
pEndPoint_->send(vt100cmd.c_str(), vt100cmd.size());
}
else
{
std::string s = command_.substr(currPos_ - vt100cmd.length(), command_.size() - currPos_ + vt100cmd.length());
s += fmt::format("\33[{}D", command_.size() - currPos_);
pEndPoint_->send(s.c_str(), s.size());
}
}
break;
}
case 0x7f: // delete
if (currPos_ < (int32)command_.length())
{
command_.erase(currPos_, 1);
pEndPoint_->send(TELNET_CMD_DEL, strlen(TELNET_CMD_DEL));
checkAfterStr();
}
break;
default:
{
std::string s = "";
s += c;
command_.insert(currPos_, s);
currPos_++;
checkAfterStr();
break;
}
};
}
}
//-------------------------------------------------------------------------------------
bool TelnetHandler::checkUDLR()
{
if(command_.find(TELNET_CMD_UP) != std::string::npos) // 上
{
pEndPoint_->send(TELNET_CMD_MOVE_FOCUS_LEFT_MAX, strlen(TELNET_CMD_MOVE_FOCUS_LEFT_MAX));
sendDelChar();
std::string startstr = getInputStartString();
pEndPoint_->send(startstr.c_str(), startstr.size());
resetStartPosition();
if(!getingHistroyCmd_)
{
++historyCommandIndex_;
getingHistroyCmd_ = true;
}
std::string s = getHistoryCommand(false);
pEndPoint_->send(s.c_str(), s.size());
command_ = s;
buffer_.clear();
currPos_ = s.size();
return true;
}
else if(command_.find(TELNET_CMD_DOWN) != std::string::npos) // 下
{
pEndPoint_->send(TELNET_CMD_MOVE_FOCUS_LEFT_MAX, strlen(TELNET_CMD_MOVE_FOCUS_LEFT_MAX));
sendDelChar();
std::string startstr = getInputStartString();
pEndPoint_->send(startstr.c_str(), startstr.size());
resetStartPosition();
if(!getingHistroyCmd_)
{
--historyCommandIndex_;
getingHistroyCmd_ = true;
}
std::string s = getHistoryCommand(true);
pEndPoint_->send(s.c_str(), s.size());
command_ = s;
buffer_.clear();
currPos_ = s.size();
return true;
}
else if(command_.find(TELNET_CMD_RIGHT) != std::string::npos) // 右
{
int cmdlen = strlen(TELNET_CMD_RIGHT);
currPos_-= cmdlen;
command_.erase(command_.find(TELNET_CMD_RIGHT), cmdlen);
if(currPos_ < (int)command_.size())
{
currPos_++;
pEndPoint_->send(TELNET_CMD_RIGHT, cmdlen);
}
return true;
}
else if(command_.find(TELNET_CMD_LEFT) != std::string::npos) // 左
{
int cmdlen = strlen(TELNET_CMD_LEFT);
currPos_-= (int)(cmdlen + 1);
if(currPos_ < 0)
{
currPos_ = 0;
}
else
{
pEndPoint_->send(TELNET_CMD_LEFT, cmdlen);
}
command_.erase(command_.find(TELNET_CMD_LEFT), cmdlen);
return true;
}
return false;
}
