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#include "terminal.h"
#include <stdio.h>
#include <stdlib.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <unistd.h>
static struct termios original_termios;
void die(const char* message)
{
/* Clear the screen */
write(STDOUT_FILENO, "\x1b[2J", 4);
write(STDOUT_FILENO, "\x1b[H", 3);
perror(message);
exit(1);
}
void disable_raw_mode()
{
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &original_termios) == -1)
die("tcsetattr");
}
/* Disables any input and output processing from the terminal */
void enable_raw_mode()
{
if (tcgetattr(STDIN_FILENO, &original_termios) == -1)
die("tcgetattr");
atexit(disable_raw_mode);
struct termios raw = original_termios;
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
raw.c_oflag &= ~(OPOST);
raw.c_cflag |= (CS8);
raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
raw.c_cc[VMIN] = 0;
raw.c_cc[VTIME] = 1;
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1)
die("tcsetattr");
}
int get_cursor_position(int* rows, int* cols)
{
char buffer[32];
unsigned int i = 0;
if (write(STDOUT_FILENO, "\x1b[6n", 4) != 4)
return -1;
while (i < sizeof(buffer) - 1) {
if (read(STDIN_FILENO, &buffer[i], 1) != 1) break;
if (buffer[i] == 'R') break;
i++;
}
buffer[i] = '\0';
printf("\r\n&buffer[1]: '%s'\r\n", &buffer[1]);
if (buffer[0] != '\x1b' || buffer[1] != '[') return -1;
if (sscanf(&buffer[2], "%d;%d", rows, cols) != 2) return -1;
return 0;
}
int get_window_size(int* rows, int* cols)
{
struct winsize size;
if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) == -1 || size.ws_col == 0) {
if (write(STDOUT_FILENO, "\x1b[999C\x1b[999B", 12) != 12)
return -1;
return get_cursor_position(rows, cols);
} else {
*cols = size.ws_col;
*rows = size.ws_row;
return 0;
}
}
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