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#include "line/mode.h"
#include <unistd.h>
#include <stdlib.h>
#include <iostream>
#include <print>
using namespace std;
namespace ov4
{
void disable_raw()
{
tcsetattr(STDIN_FILENO, TCSAFLUSH, &attr);
}
void enable_raw()
{
termios attr_raw;
tcgetattr(STDIN_FILENO, &attr);
tcgetattr(STDIN_FILENO, &attr_raw);
// LOCAL
// disable
// echo
// canonical
// signal
// disable post-input processing, aka control-V
attr_raw.c_lflag &= ~(ECHO | ICANON | ISIG | IEXTEN);
// INPUT
// disable
// software flow control, aka control-S/Q
// \n and \r conversion
attr_raw.c_iflag &= ~(IXON | ICRNL);
// OUTPUT
// disable
// post-output processing
attr_raw.c_oflag &= ~(OPOST);
// misc
attr_raw.c_iflag &= ~(BRKINT | INPCK | ISTRIP);
attr_raw.c_cflag |= ~(CS8);
atexit(disable_raw);
// TCSAFLUSH
// the change shall occur after all output written to fildes is transmitted
// and all input so far received but not read shall be discarded before the change is made
tcsetattr(STDIN_FILENO, TCSAFLUSH, &attr_raw);
}
void clear_below()
{
print("\x1b[0J");
}
string readline()
{
string buffer;
char c;
while (read(STDIN_FILENO, &c, 1) == 1)
{
if (c == 'Q') break;
else if (c == 'C')
{
clear_below();
}
else if (c == 'P')
{
get_cursor_position();
}
else if (iscntrl(c))
{
//print("control: {}\r\n", static_cast<unsigned char>(c));
//fflush(stdout);
if (c == 13) // \n
{
//print("line: {}\r\n", buffer);
return buffer;
}
// ESC sequence
if (c == '\x1b')
{
char seq[10];
// eat [
if (read(STDIN_FILENO, seq + 0, 1) != 1)
continue;
if (read(STDIN_FILENO, seq + 1, 1) != 1)
continue;
switch (seq[1])
{
case 'A':
print("\x1b[A");
fflush(stdout);
cursor_row--;
break;
case 'B':
print("\x1b[B");
fflush(stdout);
cursor_row++;
break;
case 'C':
print("\x1b[C");
fflush(stdout);
cursor_col--;
break;
case 'D':
print("\x1b[D");
fflush(stdout);
cursor_col++;
break;
default:
return "ERROR";
}
}
}
// normal char
else
{
buffer += c;
print_override(buffer);
}
}
return buffer;
}
T_position get_cursor_position()
{
char c;
string buffer;
T_position pos;
int row, col;
tcflush(STDIN_FILENO, TCIFLUSH);
cout << "\x1b[6n" << flush;
while (read(STDIN_FILENO, &c, 1) == 1)
{
if (c == 'R') break;
buffer += c;
}
if (buffer.size() <= 2 || buffer[0] != '\x1b' || buffer[1] != '[')
{
pos.row = -1;
pos.col = -1;
return pos;
}
if ((sscanf(buffer.c_str(), "\x1b[%d;%d", &row, &col)) != 2)
{
pos.row = -1;
pos.col = -1;
return pos;
}
pos.row = row;
pos.col = col;
print("row {}, col {}\r\n", row, col);
fflush(stdout);
return pos;
}
void print_override(const std::string &s)
{
print("\r");
fflush(stdout);
print("{}", s);
fflush(stdout);
cursor_col = s.size()+1;
}
}
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