90 lines
1.6 KiB
C
90 lines
1.6 KiB
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <termios.h>
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#include <unistd.h>
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#include <sys/ioctl.h>
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#include "vip.h"
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extern editor vip;
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void die(const char *s)
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{
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write(STDOUT_FILENO, "\x1b[2J", 4);
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write(STDOUT_FILENO, "\x1b[H", 3);
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perror(s);
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exit(1);
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}
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void reset_term()
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{
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &vip.termios) == -1) {
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die("tcsetattr");
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}
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}
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/*
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* Setup terminal
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*/
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void setup_term()
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{
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if (tcgetattr(STDIN_FILENO, &vip.termios) == -1) {
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die("tcgetattr");
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}
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atexit(reset_term);
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struct termios raw = vip.termios;
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/* disbable echo, line output and signals */
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raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
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raw.c_oflag &= ~(OPOST);
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raw.c_cflag |= (CS8);
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raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
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raw.c_cc[VMIN] = 0;
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raw.c_cc[VTIME] = 1;
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if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw) == -1) {
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die("tcsetattr");
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}
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}
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int get_cursor_position(int *rows, int *cols)
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{
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char buf[32];
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unsigned int i = 0;
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if (write(STDOUT_FILENO, "\x1b[6n", 4) != 4) {
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return -1;
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}
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while (i < sizeof(buf) - 1) {
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if (read(STDIN_FILENO, &buf[i], 1) != 1) {
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break;
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}
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if (buf[i] == 'R') {
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break;
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}
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i++;
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}
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buf[i] = '\0';
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if (buf[0] != '\x1b' || buf[1] != '[') {
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return -1;
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}
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if (sscanf(&buf[2], "%d;%d", rows, cols) != 2) {
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return -1;
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}
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return 0;
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}
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int get_window_size(int *rows, int *cols)
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{
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struct winsize ws;
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if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &ws) == -1 || ws.ws_col == 0) {
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/* Can't get window size */
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if (write(STDOUT_FILENO, "\x1b[999C\x1b[999B", 12) != 12) {
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return -1;
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}
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return get_cursor_position(rows, cols);
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} else {
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*cols = ws.ws_col;
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*rows = ws.ws_row;
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return 0;
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}
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}
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