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
12static 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
32static 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
82static 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
95int 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
125out:
126	free(argv);
127	free(ptr);
128	return 0;
129}
130