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
  11#include <sys/ttydefaults.h>
  12
  13static 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
  33static 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
  83static 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
  96int 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
 126out:
 127        free(argv);
 128        free(ptr);
 129        return 0;
 130}
 131