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linuxkeyboard.h
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151 lines (132 loc) · 4.56 KB
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/*******************************************************************************
* CLI - A simple command line interface.
* Copyright (C) 2016 Daniele Pallastrelli
*
* Boost Software License - Version 1.0 - August 17th, 2003
*
* Permission is hereby granted, free of charge, to any person or organization
* obtaining a copy of the software and accompanying documentation covered by
* this license (the "Software") to use, reproduce, display, distribute,
* execute, and transmit the Software, and to prepare derivative works of the
* Software, and to permit third-parties to whom the Software is furnished to
* do so, all subject to the following:
*
* The copyright notices in the Software and this entire statement, including
* the above license grant, this restriction and the following disclaimer,
* must be included in all copies of the Software, in whole or in part, and
* all derivative works of the Software, unless such copies or derivative
* works are solely in the form of machine-executable object code generated by
* a source language processor.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
* SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
* FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
******************************************************************************/
#ifndef LINUXKEYBOARD_H_
#define LINUXKEYBOARD_H_
#include <thread>
#include <memory>
#include <atomic>
#include <boost/asio.hpp>
#include <stdio.h>
#include <termios.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/time.h>
#include "inputdevice.h"
namespace cli
{
class LinuxKeyboard : public InputDevice
{
public:
explicit LinuxKeyboard(boost::asio::io_context& ios) :
InputDevice(ios)
{
ToManualMode();
servant = std::make_unique<std::thread>( [this](){ Read(); } );
servant -> detach();
}
~LinuxKeyboard()
{
run = false;
ToStandardMode();
}
private:
void Read()
{
while ( run )
{
auto k = Get();
Notify(k);
}
}
std::pair<KeyType,char> Get()
{
while ( !KbHit() ) {}
int ch = getchar();
switch( ch )
{
case 127: return std::make_pair(KeyType::backspace,' '); break;
case 10: return std::make_pair(KeyType::ret,' '); break;
case 27: // symbol
ch = getchar();
if ( ch == 91 ) // arrow keys
{
ch = getchar();
switch( ch )
{
case 51:
ch = getchar();
if ( ch == 126 ) return std::make_pair(KeyType::canc,' ');
else return std::make_pair(KeyType::ignored,' ');
break;
case 65: return std::make_pair(KeyType::up,' ');
case 66: return std::make_pair(KeyType::down,' ');
case 68: return std::make_pair(KeyType::left,' ');
case 67: return std::make_pair(KeyType::right,' ');
case 70: return std::make_pair(KeyType::end,' ');
case 72: return std::make_pair(KeyType::home,' ');
}
}
break;
default: // ascii
{
const char c = static_cast<char>(ch);
return std::make_pair(KeyType::ascii,c);
}
}
return std::make_pair(KeyType::ignored,' ');
}
void ToManualMode()
{
tcgetattr( STDIN_FILENO, &oldt );
newt = oldt;
newt.c_lflag &= ~( ICANON | ECHO );
tcsetattr( STDIN_FILENO, TCSANOW, &newt );
}
void ToStandardMode()
{
tcsetattr( STDIN_FILENO, TCSANOW, &oldt );
}
static int KbHit()
{
struct timeval tv;
fd_set rdfs;
tv.tv_sec = 1;
tv.tv_usec = 0;
FD_ZERO(&rdfs);
FD_SET (STDIN_FILENO, &rdfs);
select(STDIN_FILENO+1, &rdfs, NULL, NULL, &tv);
return FD_ISSET(STDIN_FILENO, &rdfs);
}
termios oldt;
termios newt;
std::atomic<bool> run{ true };
std::unique_ptr<std::thread> servant;
};
} // namespace
#endif // LINUXKEYBOARD_H_