tools/perf/ui/browsers/header.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include "util/cache.h"
   3 #include "util/debug.h"
   4 #include "ui/browser.h"
   5 #include "ui/keysyms.h"
   6 #include "ui/ui.h"
   7 #include "ui/util.h"
   8 #include "ui/libslang.h"
   9 #include "util/header.h"
  10 #include "util/session.h"
  11
  12 #include <sys/ttydefaults.h>
  13
  14 static void ui_browser__argv_write(struct ui_browser *browser,
  15                                    void *entry, int row)
  16 {
  17         char **arg = entry;
  18         char *str = *arg;
  19         char empty[] = " ";
  20         bool current_entry = ui_browser__is_current_entry(browser, row);
  21         unsigned long offset = (unsigned long)browser->priv;
  22
  23         if (offset >= strlen(str))
  24                 str = empty;
  25         else
  26                 str = str + offset;
  27
  28         ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
  29                                                        HE_COLORSET_NORMAL);
  30
  31         ui_browser__write_nstring(browser, str, browser->width);
  32 }
  33
  34 static int list_menu__run(struct ui_browser *menu)
  35 {
  36         int key;
  37         unsigned long offset;
  38         const char help[] =
  39         "h/?/F1        Show this window\n"
  40         "UP/DOWN/PGUP\n"
  41         "PGDN/SPACE\n"
  42         "LEFT/RIGHT    Navigate\n"
  43         "q/ESC/CTRL+C  Exit browser";
  44
  45         if (ui_browser__show(menu, "Header information", "Press 'q' to exit") < 0)
  46                 return -1;
  47
  48         while (1) {
  49                 key = ui_browser__run(menu, 0);
  50
  51                 switch (key) {
  52                 case K_RIGHT:
  53                         offset = (unsigned long)menu->priv;
  54                         offset += 10;
  55                         menu->priv = (void *)offset;
  56                         continue;
  57                 case K_LEFT:
  58                         offset = (unsigned long)menu->priv;
  59                         if (offset >= 10)
  60                                 offset -= 10;
  61                         menu->priv = (void *)offset;
  62                         continue;
  63                 case K_F1:
  64                 case 'h':
  65                 case '?':
  66                         ui_browser__help_window(menu, help);
  67                         continue;
  68                 case K_ESC:
  69                 case 'q':
  70                 case CTRL('c'):
  71                         key = -1;
  72                         break;
  73                 default:
  74                         continue;
  75                 }
  76
  77                 break;
  78         }
  79
  80         ui_browser__hide(menu);
  81         return key;
  82 }
  83
  84 static int ui__list_menu(int argc, char * const argv[])
  85 {
  86         struct ui_browser menu = {
  87                 .entries    = (void *)argv,
  88                 .refresh    = ui_browser__argv_refresh,
  89                 .seek       = ui_browser__argv_seek,
  90                 .write      = ui_browser__argv_write,
  91                 .nr_entries = argc,
  92         };
  93
  94         return list_menu__run(&menu);
  95 }
  96
  97 int tui__header_window(struct perf_env *env)
  98 {
  99         int i, argc = 0;
 100         char **argv;
 101         struct perf_session *session;
 102         char *ptr, *pos;
 103         size_t size;
 104         FILE *fp = open_memstream(&ptr, &size);
 105
 106         session = container_of(env, struct perf_session, header.env);
 107         perf_header__fprintf_info(session, fp, true);
 108         fclose(fp);
 109
 110         for (pos = ptr, argc = 0; (pos = strchr(pos, '\n')) != NULL; pos++)
 111                 argc++;
 112
 113         argv = calloc(argc + 1, sizeof(*argv));
 114         if (argv == NULL)
 115                 goto out;
 116
 117         argv[0] = pos = ptr;
 118         for (i = 1; (pos = strchr(pos, '\n')) != NULL; i++) {
 119                 *pos++ = '\0';
 120                 argv[i] = pos;
 121         }
 122
 123         BUG_ON(i != argc + 1);
 124
 125         ui__list_menu(argc, argv);
 126
 127 out:
 128         free(argv);
 129         free(ptr);
 130         return 0;
 131 }