LXR linux/tools/perf/ui/gtk/helpline.c

   1// SPDX-License-Identifier: GPL-2.0
   2#include <stdio.h>
   3#include <string.h>
   4
   5#include "gtk.h"
   6#include "../ui.h"
   7#include "../helpline.h"
   8#include "../../util/debug.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}
  59