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TOMOYO Linux Cross Reference
Linux/tools/perf/ui/browsers/header.c

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  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 }
130 

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