diff options
Diffstat (limited to 'l.c')
| -rw-r--r-- | l.c | 204 |
1 files changed, 0 insertions, 204 deletions
@@ -1,204 +0,0 @@ -#include <ctype.h> -#include <err.h> -#include <fcntl.h> -#include <stdbool.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/ioctl.h> -#include <sys/ttydefaults.h> -#include <termios.h> -#include <unistd.h> - -#define ESC "\033" -#define CSI ESC "[" - -#define prn(...) dprintf(ttyfd, __VA_ARGS__) -#define rerr(...) do { raw(false); err(__VA_ARGS__); } while (0) - -char **lines; -int lines_c; -int lines_s; - -int current = -1; /* currently selected item */ -int x, y; /* original cursor position in cols, rows */ -int ttyfd; - -/* enable/disable "raw" mode */ -void raw(bool enable) { - int r; - static struct termios orig; - struct termios raw; - - if (enable) { - r = tcgetattr(ttyfd, &orig); - if (r == -1) err(1, "tcgetattr"); - - raw = orig; - raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON); - raw.c_oflag &= ~OPOST; - raw.c_cflag |= CS8; - raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG); - - r = tcsetattr(ttyfd, TCSAFLUSH, &raw); - if (r == -1) err(1, "tcsetattr"); - - } else - tcsetattr(ttyfd, TCSAFLUSH, &orig); -} - -/* cursor position report */ -int cpr(int *x, int *y) { - char c, xbuf[4], ybuf[4]; - int i; - - prn(CSI "6n"); - - /* get CSI */ - read(ttyfd, &c, 1); - if (c != '\033') return -1; - read(ttyfd, &c, 1); - if (c != '[') return -1; - - /* get x */ - i = 0; - while (read(ttyfd, &c, 1) && c != ';') { - if (i > 3 || !isdigit(c)) return -1; - ybuf[i++] = c; - } - if (i == 0) return -1; - ybuf[i] = '\0'; - - /* get y */ - i = 0; - while (read(ttyfd, &c, 1) && c != 'R') { - if (i > 3 || !isdigit(c)) return -1; - xbuf[i++] = c; - } - if (i == 0) return -1; - xbuf[i] = '\0'; - - *x = atoi(xbuf); - *y = atoi(ybuf); - - return 0; -} - -/* select item */ -int item(int n) { - if (n < 1 || n > lines_c) return -1; - if (current != -1) - prn("%s", lines[current - 1]); - current = n; - prn("%s%d;%dH", CSI, y + n - 1, 0); - prn(CSI "7m"); - prn("%s", lines[n - 1]); - prn(CSI "0m"); - prn("%s%d;%dH", CSI, y + n - 1, 0); - return 0; -} - -int up() { return item(current-1); } -int down() { return item(current+1); } -int right() {} -int left() {} - -int main() { - char c, *line, *p, *phrase, *tmp; - int i, line_s, r; - struct winsize w; - phrase = NULL; - - ttyfd = open("/dev/tty", O_RDWR); - if (ttyfd == -1) rerr(1, "open"); - - /* read from standard input */ - - line_s = 100; - line = malloc((line_s + 1) * sizeof(char)); - if (line == NULL) err(1, "malloc"); - - lines_c = 0; - lines_s = 50; - lines = malloc(lines_s * sizeof(char *)); - if (lines == NULL) err(1, "malloc"); - - i = 0; - while (read(STDIN_FILENO, &c, 1) != 0) { - if (c == '\n') { - line[i] = '\0'; - lines[lines_c] = malloc((strlen(line) + 1) * sizeof(char)); - if (lines[lines_c] == NULL) err(1, "malloc"); - strcpy(lines[lines_c], line); - lines_c++; - i = 0; - } else { - if (i > line_s) { - line_s += 50; - tmp = realloc(line, (line_s + 1) * sizeof(char)); - if (tmp == NULL) err(1, "realloc"); - line = tmp; - } - line[i++] = c; - } - } - - raw(true); - - /* save original cursor position */ - r = cpr(&x, &y); - if (r == -1) { - fprintf(stderr, "could not retrieve cursor position"); - goto quit; - } - - /* print output */ - for (i = 0; i < lines_c; i++) - prn("%s\r\n", lines[i]); - - /* get height of terminal */ - r = ioctl(ttyfd, TIOCGWINSZ, &w); - if (r == -1) rerr(1, "ioctl"); - - /* correct cursor position if original cursor was near bottom */ - r = y + lines_c - w.ws_row; - if (r > 0) - y = y - r; - - /* restore original cursor position (CUP) */ - prn("%s%d;%dH", CSI, y, x); - - /* select first item */ - item(1); - - while (read(ttyfd, &c, 1) != 0) { - switch (c) { - case 'q': - goto quit; - break; - case '\033': - read(ttyfd, &c, 1); - if (c != '[') break; - read(ttyfd, &c, 1); - if (c == 'A') up(); - if (c == 'B') down(); - if (c == 'C') right(); - if (c == 'D') left(); - break; - case 13: /* enter */ - phrase = lines[current - 1]; - goto quit; - } - } -quit: - prn("%s%d;%dH", CSI, y, x); - prn(CSI "J"); /* delete from cursor to end of display (ED) */ - raw(false); - if (phrase != NULL) - printf("%s\n", phrase); - return 0; -die: - raw(false); - puts("died"); - return 0; -} |