1// SPDX-License-Identifier: GPL-2.0
 2#include <stdio.h>
 3#include <string.h>
 4#include <linux/kernel.h>
 5
 6#include "gtk.h"
 7#include "../ui.h"
 8#include "../helpline.h"
 9
10static void gtk_helpline_pop(void)
11{
12	if (!perf_gtk__is_active_context(pgctx))
13		return;
14
15	gtk_statusbar_pop(GTK_STATUSBAR(pgctx->statbar),
16			  pgctx->statbar_ctx_id);
17}
18
19static void gtk_helpline_push(const char *msg)
20{
21	if (!perf_gtk__is_active_context(pgctx))
22		return;
23
24	gtk_statusbar_push(GTK_STATUSBAR(pgctx->statbar),
25			   pgctx->statbar_ctx_id, msg);
26}
27
28static int gtk_helpline_show(const char *fmt, va_list ap)
29{
30	int ret;
31	char *ptr;
32	static int backlog;
33
34	ret = vscnprintf(ui_helpline__current + backlog,
35			 sizeof(ui_helpline__current) - backlog, fmt, ap);
36	backlog += ret;
37
38	/* only first line can be displayed */
39	ptr = strchr(ui_helpline__current, '\n');
40	if (ptr && (ptr - ui_helpline__current) <= backlog) {
41		*ptr = '\0';
42		ui_helpline__puts(ui_helpline__current);
43		backlog = 0;
44	}
45
46	return ret;
47}
48
49static struct ui_helpline gtk_helpline_fns = {
50	.pop	= gtk_helpline_pop,
51	.push	= gtk_helpline_push,
52	.show	= gtk_helpline_show,
53};
54
55void perf_gtk__init_helpline(void)
56{
57	helpline_fns = &gtk_helpline_fns;
58}