tools/perf/ui/browsers/header.c

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