ui/browsers/header.c

0001 // SPDX-License-Identifier: GPL-2.0
0002 #include "ui/browser.h"
0003 #include "ui/keysyms.h"
0004 #include "ui/ui.h"
0005 #include "ui/util.h"
0006 #include "ui/libslang.h"
0007 #include "util/header.h"
0008 #include "util/session.h"
0009
0010 #include <sys/ttydefaults.h>
0011
0012 static void ui_browser__argv_write(struct ui_browser *browser,
0013                    void *entry, int row)
0014 {
0015     char **arg = entry;
0016     char *str = *arg;
0017     char empty[] = " ";
0018     bool current_entry = ui_browser__is_current_entry(browser, row);
0019     unsigned long offset = (unsigned long)browser->priv;
0020
0021     if (offset >= strlen(str))
0022         str = empty;
0023     else
0024         str = str + offset;
0025
0026     ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
0027                                HE_COLORSET_NORMAL);
0028
0029     ui_browser__write_nstring(browser, str, browser->width);
0030 }
0031
0032 static int list_menu__run(struct ui_browser *menu)
0033 {
0034     int key;
0035     unsigned long offset;
0036     static const char help[] =
0037     "h/?/F1        Show this window\n"
0038     "UP/DOWN/PGUP\n"
0039     "PGDN/SPACE\n"
0040     "LEFT/RIGHT    Navigate\n"
0041     "q/ESC/CTRL+C  Exit browser";
0042
0043     if (ui_browser__show(menu, "Header information", "Press 'q' to exit") < 0)
0044         return -1;
0045
0046     while (1) {
0047         key = ui_browser__run(menu, 0);
0048
0049         switch (key) {
0050         case K_RIGHT:
0051             offset = (unsigned long)menu->priv;
0052             offset += 10;
0053             menu->priv = (void *)offset;
0054             continue;
0055         case K_LEFT:
0056             offset = (unsigned long)menu->priv;
0057             if (offset >= 10)
0058                 offset -= 10;
0059             menu->priv = (void *)offset;
0060             continue;
0061         case K_F1:
0062         case 'h':
0063         case '?':
0064             ui_browser__help_window(menu, help);
0065             continue;
0066         case K_ESC:
0067         case 'q':
0068         case CTRL('c'):
0069             key = -1;
0070             break;
0071         default:
0072             continue;
0073         }
0074
0075         break;
0076     }
0077
0078     ui_browser__hide(menu);
0079     return key;
0080 }
0081
0082 static int ui__list_menu(int argc, char * const argv[])
0083 {
0084     struct ui_browser menu = {
0085         .entries    = (void *)argv,
0086         .refresh    = ui_browser__argv_refresh,
0087         .seek       = ui_browser__argv_seek,
0088         .write      = ui_browser__argv_write,
0089         .nr_entries = argc,
0090     };
0091
0092     return list_menu__run(&menu);
0093 }
0094
0095 int tui__header_window(struct perf_env *env)
0096 {
0097     int i, argc = 0;
0098     char **argv;
0099     struct perf_session *session;
0100     char *ptr, *pos;
0101     size_t size;
0102     FILE *fp = open_memstream(&ptr, &size);
0103
0104     session = container_of(env, struct perf_session, header.env);
0105     perf_header__fprintf_info(session, fp, true);
0106     fclose(fp);
0107
0108     for (pos = ptr, argc = 0; (pos = strchr(pos, '\n')) != NULL; pos++)
0109         argc++;
0110
0111     argv = calloc(argc + 1, sizeof(*argv));
0112     if (argv == NULL)
0113         goto out;
0114
0115     argv[0] = pos = ptr;
0116     for (i = 1; (pos = strchr(pos, '\n')) != NULL; i++) {
0117         *pos++ = '\0';
0118         argv[i] = pos;
0119     }
0120
0121     BUG_ON(i != argc + 1);
0122
0123     ui__list_menu(argc, argv);
0124
0125 out:
0126     free(argv);
0127     free(ptr);
0128     return 0;
0129 }