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#include "line/cursor.h"
#include <print>
#include <iostream>
#include <string>
#include <unistd.h>
#include <cstdio>
#include <cstdlib>
#include <termios.h>
#include <sys/ioctl.h>
using namespace std;
namespace ov4
{
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("\x1b[s"); fflush(stdout);
print("\r"); fflush(stdout);
// move to the "start" of the zone
// should skip prompt zone
print("\x1b[{}C", line_begin_pos-1); fflush(stdout);
// erase rest of it
print("\x1b[K"); fflush(stdout);
print("{}", s);
fflush(stdout);
//line_end_pos = s.size()+1;
print("\x1b[u"); fflush(stdout);
}
void move_cursor(char c)
{
switch (c)
{
// case 'A':
// print("\x1b[A");
// fflush(stdout);
// cursor_row--;
// break;
// case 'B':
// print("\x1b[B");
// fflush(stdout);
// cursor_row++;
// break;
case 'C':
if (get_cursor_real_pos() < line_end_pos)
{
print("\x1b[C");
fflush(stdout);
line_buffer_index++;
}
break;
case 'D':
if (get_cursor_real_pos() > line_begin_pos)
{
print("\x1b[D");
fflush(stdout);
line_buffer_index--;
}
break;
default:
return;
}
}
void cursor_input(char c, std::string &buffer)
{
// normal input
if (c != '\b')
{
buffer.insert(line_buffer_index, 1, c);
print("\x1b[C"); fflush(stdout);
line_buffer_index++;
buffer_len = buffer.size();
update_line_end_pos();
return;
}
// BACKSPACE
buffer.erase(line_buffer_index, 1);
print("\x1b[D"); fflush(stdout);
line_buffer_index--;
buffer_len = buffer.size();
update_line_end_pos();
}
int get_cursor_real_pos()
{
return line_begin_pos + line_buffer_index;
}
void update_window_size()
{
winsize ws;
if (ioctl(1, TIOCGWINSZ, &ws) == -1)
exit(-1); // TODO: fix
window_size_row = ws.ws_row;
window_size_col = ws.ws_col;
}
void update_line_end_pos()
{
line_end_pos = line_begin_pos + buffer_len;
line_end_pos = (line_end_pos > window_size_col) ? window_size_col : line_end_pos;
}
}
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