xref: /openbmc/linux/tools/perf/ui/gtk/helpline.c (revision f7a858bf)
1 // SPDX-License-Identifier: GPL-2.0
2 #include "gtk.h"
3 #include <stdio.h>
4 #include <string.h>
5 #include <linux/kernel.h>
6 
7 #include "../ui.h"
8 #include "../helpline.h"
9 
gtk_helpline_pop(void)10 static 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 
gtk_helpline_push(const char * msg)19 static 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 
gtk_helpline_show(const char * fmt,va_list ap)28 static 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 
49 static struct ui_helpline gtk_helpline_fns = {
50 	.pop	= gtk_helpline_pop,
51 	.push	= gtk_helpline_push,
52 	.show	= gtk_helpline_show,
53 };
54 
perf_gtk__init_helpline(void)55 void perf_gtk__init_helpline(void)
56 {
57 	helpline_fns = &gtk_helpline_fns;
58 }
59