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