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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <fcntl.h>
#include "util.h"
#include "ui.h"
#define MAX_STATUS 128
static char stbuf[MAX_STATUS];
static unsigned short rows;
static unsigned short cols;
static struct termios prevstate;
static int tty_fd;
int uiinit(const State *state)
{
struct winsize w;
struct termios t;
if ((tty_fd = open("/dev/tty", O_RDWR|O_NOCTTY|O_CLOEXEC)) < 0)
die("getpass: can't open /dev/tty for input");
tcgetattr(tty_fd, &t);
prevstate = t;
if (state->flag & IGNORE_ISIG)
t.c_lflag &= ~(ISIG);
t.c_lflag &= ~(ECHO|INLCR|IGNCR|ICANON);
t.c_iflag |= ICRNL;
tcsetattr(tty_fd, TCSAFLUSH, &t);
tcdrain(tty_fd);
if (ioctl(STDIN_FILENO, TIOCGWINSZ, &w) == -1)
die("ioctl() failed");
rows = w.ws_row;
cols = w.ws_col;
printf("%c7", ESC); /* save cursor */
printf("%c[?47h", ESC); /* use alt buffer */
printf("%c[?25l", ESC); /* hide cursor */
printf("%c[2J", ESC); /* clear vt */
return tty_fd;
}
void pheader(const char *s)
{
unsigned short col, row;
row = rows / 2;
col = (cols - strlen(s)) / 2;
printf("%c[%d;%dH", ESC, row, col); /* pos curosr */
printf("%c[2K", ESC); /* clear line */
puts(s);
}
void pstatus(const char *s)
{
unsigned short col, row;
row = rows / 2 + 1;
col = (cols - strlen(s)) / 2;
printf("%c[%d;%dH", ESC, row, col); /* pos cursor */
printf("%c[2K", ESC); /* clear line */
puts(s);
}
void pstaticstat(const char *head, const char c)
{
size_t stlen;
if ((stlen = strlen(head)) > MAX_STATUS - 1)
stlen = MAX_STATUS - 1;
stbuf[stlen] = '\0';
memset(stbuf, c, stlen);
pstatus(stbuf);
}
void genrandstat(const char *head, const char *statstr)
{
int entropy;
size_t srlen, stlen, i;
if ((stlen = strlen(head)) > MAX_STATUS - 1)
stlen = MAX_STATUS - 1;
srlen = strlen(statstr);
for (entropy = i = 0; i < stlen; ++i, entropy /= srlen) {
if (!entropy)
entropy = rand();
stbuf[i] = statstr[entropy % srlen];
}
stbuf[stlen] = '\0';
pstatus(stbuf);
}
void uicleanup(void)
{
printf("%c[2J", ESC); /* clear vt */
printf("%c[?25h", ESC); /* show cursor */
printf("%c[?47l", ESC); /* use normal buffer */
printf("%c8", ESC); /* restore cursor */
tcsetattr(tty_fd, TCSAFLUSH, &prevstate);
close(tty_fd);
}
void pui(const char *head, const char stat)
{
size_t stlen;
if ((stlen = strlen(head)) > MAX_STATUS - 1)
stlen = MAX_STATUS - 1;
stbuf[stlen] = '\0';
pheader(head);
pstatus(memset(stbuf, stat, stlen));
}
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