kernel/tools/perf/ui/browsers/header.c

   1 #include "util/cache.h"
   2 #include "util/debug.h"
   3 #include "ui/browser.h"
   4 #include "ui/keysyms.h"
   5 #include "ui/ui.h"
   6 #include "ui/util.h"
   7 #include "ui/libslang.h"
   8 #include "util/header.h"
   9 #include "util/session.h"
  10
  11 static void ui_browser__argv_write(struct ui_browser *browser,
  12                                    void *entry, int row)
  13 {
  14         char **arg = entry;
  15         char *str = *arg;
  16         char empty[] = " ";
  17         bool current_entry = ui_browser__is_current_entry(browser, row);
  18         unsigned long offset = (unsigned long)browser->priv;
  19
  20         if (offset >= strlen(str))
  21                 str = empty;
  22         else
  23                 str = str + offset;
  24
  25         ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
  26                                                        HE_COLORSET_NORMAL);
  27
  28         slsmg_write_nstring(str, browser->width);
  29 }
  30
  31 static int list_menu__run(struct ui_browser *menu)
  32 {
  33         int key;
  34         unsigned long offset;
  35         const char help[] =
  36         "h/?/F1        Show this window\n"
  37         "UP/DOWN/PGUP\n"
  38         "PGDN/SPACE\n"
  39         "LEFT/RIGHT    Navigate\n"
  40         "q/ESC/CTRL+C  Exit browser";
  41
  42         if (ui_browser__show(menu, "Header information", "Press 'q' to exit") < 0)
  43                 return -1;
  44
  45         while (1) {
  46                 key = ui_browser__run(menu, 0);
  47
  48                 switch (key) {
  49                 case K_RIGHT:
  50                         offset = (unsigned long)menu->priv;
  51                         offset += 10;
  52                         menu->priv = (void *)offset;
  53                         continue;
  54                 case K_LEFT:
  55                         offset = (unsigned long)menu->priv;
  56                         if (offset >= 10)
  57                                 offset -= 10;
  58                         menu->priv = (void *)offset;
  59                         continue;
  60                 case K_F1:
  61                 case 'h':
  62                 case '?':
  63                         ui_browser__help_window(menu, help);
  64                         continue;
  65                 case K_ESC:
  66                 case 'q':
  67                 case CTRL('c'):
  68                         key = -1;
  69                         break;
  70                 default:
  71                         continue;
  72                 }
  73
  74                 break;
  75         }
  76
  77         ui_browser__hide(menu);
  78         return key;
  79 }
  80
  81 static int ui__list_menu(int argc, char * const argv[])
  82 {
  83         struct ui_browser menu = {
  84                 .entries    = (void *)argv,
  85                 .refresh    = ui_browser__argv_refresh,
  86                 .seek       = ui_browser__argv_seek,
  87                 .write      = ui_browser__argv_write,
  88                 .nr_entries = argc,
  89         };
  90
  91         return list_menu__run(&menu);
  92 }
  93
  94 int tui__header_window(struct perf_session_env *env)
  95 {
  96         int i, argc = 0;
  97         char **argv;
  98         struct perf_session *session;
  99         char *ptr, *pos;
 100         size_t size;
 101         FILE *fp = open_memstream(&ptr, &size);
 102
 103         session = container_of(env, struct perf_session, header.env);
 104         perf_header__fprintf_info(session, fp, true);
 105         fclose(fp);
 106
 107         for (pos = ptr, argc = 0; (pos = strchr(pos, '\n')) != NULL; pos++)
 108                 argc++;
 109
 110         argv = calloc(argc + 1, sizeof(*argv));
 111         if (argv == NULL)
 112                 goto out;
 113
 114         argv[0] = pos = ptr;
 115         for (i = 1; (pos = strchr(pos, '\n')) != NULL; i++) {
 116                 *pos++ = '\0';
 117                 argv[i] = pos;
 118         }
 119
 120         BUG_ON(i != argc + 1);
 121
 122         ui__list_menu(argc, argv);
 123
 124 out:
 125         free(argv);
 126         free(ptr);
 127         return 0;
 128 }