// SPDX-License-Identifier: GPL-2.0
#include "gtk.h"
#include <stdio.h>
#include <string.h>
#include <linux/kernel.h>

#include "../ui.h"
#include "../helpline.h"

static void gtk_helpline_pop(void)
{
        if (!perf_gtk__is_active_context(pgctx))
                return;

        gtk_statusbar_pop(GTK_STATUSBAR(pgctx->statbar),
                          pgctx->statbar_ctx_id);
}

static void gtk_helpline_push(const char *msg)
{
        if (!perf_gtk__is_active_context(pgctx))
                return;

        gtk_statusbar_push(GTK_STATUSBAR(pgctx->statbar),
                           pgctx->statbar_ctx_id, msg);
}

static int gtk_helpline_show(const char *fmt, va_list ap)
{
        int ret;
        char *ptr;
        static int backlog;

        ret = vscnprintf(ui_helpline__current + backlog,
                         sizeof(ui_helpline__current) - backlog, fmt, ap);
        backlog += ret;

        /* only first line can be displayed */
        ptr = strchr(ui_helpline__current, '\n');
        if (ptr && (ptr - ui_helpline__current) <= backlog) {
                *ptr = '\0';
                ui_helpline__puts(ui_helpline__current);
                backlog = 0;
        }

        return ret;
}

static struct ui_helpline gtk_helpline_fns = {
        .pop    = gtk_helpline_pop,
        .push   = gtk_helpline_push,
        .show   = gtk_helpline_show,
};

void perf_gtk__init_helpline(void)
{
        helpline_fns = &gtk_helpline_fns;
}