LXR linux/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
  11static 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        ui_browser__write_nstring(browser, str, browser->width);
  29}
  30
  31static 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
  81static 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
  94int tui__header_window(struct perf_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
 124out:
 125        free(argv);
 126        free(ptr);
 127        return 0;
 128}
 129