tools/perf/ui/browsers/header.c

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