LXR linux/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
   9static 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
  18static 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
  27static 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
  48static struct ui_helpline gtk_helpline_fns = {
  49        .pop    = gtk_helpline_pop,
  50        .push   = gtk_helpline_push,
  51        .show   = gtk_helpline_show,
  52};
  53
  54void perf_gtk__init_helpline(void)
  55{
  56        helpline_fns = &gtk_helpline_fns;
  57}
  58