header.c

  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			ui_browser__warn_unhandled_hotkey(menu, key, 0, ", use 'h'/'?'/F1 to see actions");
 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_session *session)
 97{
 98	int i, argc = 0;
 99	char **argv;
100	char *ptr, *pos;
101	size_t size;
102	FILE *fp = open_memstream(&ptr, &size);
103
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}