tools/perf/ui/gtk/helpline.c

   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
  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
  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
  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
  55 void perf_gtk__init_helpline(void)
  56 {
  57         helpline_fns = &gtk_helpline_fns;
  58 }