nshell/src/main.c

#include <gint/keyboard.h>
#include <gint/timer.h>

#include "term.h"
#include <gint/display.h>

#include <stdio.h>
#include <string.h>

static char *LOREM_IPSUM =
    "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Nam vitae purus dolor. Praesent in ex tempus, auctor velit at, "
    "vulputate sapien. Aenean semper, dui vitae iaculis mattis, odio libero aliquet elit, nec tempor nisl turpis vel arcu. "
    "Vestibulum eleifend maximus enim at sollicitudin. Nulla eu commodo justo. Ut vitae pellentesque erat. Duis magna nisl, "
    "eleifend ac massa at, blandit sollicitudin ipsum. Interdum et malesuada fames ac ante ipsum primis in faucibus. "
    "Orci varius natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Ut at libero in turpis porttitor "
    "viverra. Ut eu pellentesque purus. Vestibulum aliquet facilisis ante, eget volutpat metus. Cras semper lacus ac mauris "
    "imperdiet, vel egestas est luctus. Aliquam elit enim, dignissim nec enim vel, consequat ullamcorper libero. Pellentesque at "
    "iaculis lctus. Praesent sed velit at tellus hendrerit mattis eu nec velit. Phasellus eu quam nec nisi mattis elementum quis "
    "nec enim. Nulla efficitur turpis id tempus ultricies. Pellentesque semper lacinia mi vitae feugiat. Vestibulum leo nisi, "
    "pretium quis felis non, mattis varius risus. "
    "Suspendisse porttitor purus lacinia ante euismod, ut eleifend massa fermentum. Proin pretium elementum massa, at efficitur "
    "risus iaculis sed.";

static volatile int key_poll_timeout;
static int tick_ctr = 0;
static int callback_keypoll(void) {
    key_poll_timeout = 0;
    return TIMER_STOP;
}

int shift_ctr = 0;
static char statusbar[UNS_TERM_COLS + 1];
static void set_statusbar(void) {
    // set green bar
    for (int i = 0; i < UNS_TERM_COLS; i++)
        tgrid_sets(0, i, C_NONE, C_GREEN, " ");

    // then add actutal text
    sprintf(statusbar, "↑Aa %d %d", tick_ctr, shift_ctr);
    tgrid_sets(0, 0, C_BLACK, C_GREEN, statusbar);
}

static void center_str(int len, char buf[len], const char* s) {
	const int l = strlen(s);
	const int before = len/2 - l/2;

    int i;
    for (i=0; i < before; i++)
		buf[i] = ' ';

    for (int j = 0; j < l; j++)
		buf[i++] = s[j];

    for (; i < len; i++)
		buf[i] = ' ';
}

static char fnkeys[6][11] = {"opt 1-", "opt 2--", "opt 3---", "opt 4----", "opt 5-----", "opt 6"};
static void set_menubar(void) {
    int col = 0;
    for (int i = 0; i < 6; i++) {
        char buf[11] = "";
		center_str(10, buf, fnkeys[i]);
		buf[10] = '\0';

        tgrid_sets(UNS_TERM_ROWS - 1, col, C_WHITE, C_BLUE, buf);
        col += 10 + 1;
    }
}

int main(void) {
    const int timer = timer_configure(TIMER_ANY, 15625, GINT_CALL(callback_keypoll));

    while (1) {
        tgrid_sets(1, 0, C_WHITE, C_BLACK, LOREM_IPSUM);
        set_statusbar();
        set_menubar();
        tgrid_display();

        key_poll_timeout = 1;
        key_event_t kev = getkey_opt(GETKEY_DEFAULT, &key_poll_timeout);
        timer_start(timer);
        if (kev.type != KEYEV_NONE)
            tick_ctr++;
    }

    return 1;
}