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 #include <sys/ttydefaults.h>
  12
  13 static void ui_browser__argv_write(struct ui_browser *browser,
  14                                    void *entry, int row)
  15 {
  16         char **arg = entry;
  17         char *str = *arg;
  18         char empty[] = " ";
  19         bool current_entry = ui_browser__is_current_entry(browser, row);
  20         unsigned long offset = (unsigned long)browser->priv;
  21
  22         if (offset >= strlen(str))
  23                 str = empty;
  24         else
  25                 str = str + offset;
  26
  27         ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
  28                                                        HE_COLORSET_NORMAL);
  29
  30         ui_browser__write_nstring(browser, str, browser->width);
  31 }
  32
  33 static int list_menu__run(struct ui_browser *menu)
  34 {
  35         int key;
  36         unsigned long offset;
  37         const char help[] =
  38         "h/?/F1        Show this window\n"
  39         "UP/DOWN/PGUP\n"
  40         "PGDN/SPACE\n"
  41         "LEFT/RIGHT    Navigate\n"
  42         "q/ESC/CTRL+C  Exit browser";
  43
  44         if (ui_browser__show(menu, "Header information", "Press 'q' to exit") < 0)
  45                 return -1;
  46
  47         while (1) {
  48                 key = ui_browser__run(menu, 0);
  49
  50                 switch (key) {
  51                 case K_RIGHT:
  52                         offset = (unsigned long)menu->priv;
  53                         offset += 10;
  54                         menu->priv = (void *)offset;
  55                         continue;
  56                 case K_LEFT:
  57                         offset = (unsigned long)menu->priv;
  58                         if (offset >= 10)
  59                                 offset -= 10;
  60                         menu->priv = (void *)offset;
  61                         continue;
  62                 case K_F1:
  63                 case 'h':
  64                 case '?':
  65                         ui_browser__help_window(menu, help);
  66                         continue;
  67                 case K_ESC:
  68                 case 'q':
  69                 case CTRL('c'):
  70                         key = -1;
  71                         break;
  72                 default:
  73                         continue;
  74                 }
  75
  76                 break;
  77         }
  78
  79         ui_browser__hide(menu);
  80         return key;
  81 }
  82
  83 static int ui__list_menu(int argc, char * const argv[])
  84 {
  85         struct ui_browser menu = {
  86                 .entries    = (void *)argv,
  87                 .refresh    = ui_browser__argv_refresh,
  88                 .seek       = ui_browser__argv_seek,
  89                 .write      = ui_browser__argv_write,
  90                 .nr_entries = argc,
  91         };
  92
  93         return list_menu__run(&menu);
  94 }
  95
  96 int tui__header_window(struct perf_env *env)
  97 {
  98         int i, argc = 0;
  99         char **argv;
 100         struct perf_session *session;
 101         char *ptr, *pos;
 102         size_t size;
 103         FILE *fp = open_memstream(&ptr, &size);
 104
 105         session = container_of(env, struct perf_session, header.env);
 106         perf_header__fprintf_info(session, fp, true);
 107         fclose(fp);
 108
 109         for (pos = ptr, argc = 0; (pos = strchr(pos, '\n')) != NULL; pos++)
 110                 argc++;
 111
 112         argv = calloc(argc + 1, sizeof(*argv));
 113         if (argv == NULL)
 114                 goto out;
 115
 116         argv[0] = pos = ptr;
 117         for (i = 1; (pos = strchr(pos, '\n')) != NULL; i++) {
 118                 *pos++ = '\0';
 119                 argv[i] = pos;
 120         }
 121
 122         BUG_ON(i != argc + 1);
 123
 124         ui__list_menu(argc, argv);
 125
 126 out:
 127         free(argv);
 128         free(ptr);
 129         return 0;
 130 }