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#include "line/line_editor.h"
#include <cstdio>
#include <string>
#include <termios.h>
#include <sys/ioctl.h>
#include <iostream>
#include <unistd.h>
#include <cmath>
using namespace std;
namespace ov4
{
int T_line_editor::get_terminal_pos_cursor()
{
return prompt_pos + (buffer_index_cursor - get_buffer_index_display_begin()) + 1;
}
int T_line_editor::get_buffer_index_display_begin()
{
return _buffer_index_display_begin;
}
int T_line_editor::get_buffer_index_display_end()
{
int max_possible_end = get_buffer_index_display_begin() + line_buffer.size() - 1;
int window_possible_end = get_buffer_index_display_begin() + (window_size_col - prompt_pos) -1;
return min(max_possible_end, window_possible_end);
}
int T_line_editor::get_terminal_pos_line_end()
{
int possible = prompt_pos + line_buffer.size();
return min(possible, window_size_col);
}
T_position T_line_editor::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;
}
}
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