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proc_files.c (3804B)

      1 /*
      2  * proc_files.c - shows ALSA system information files
      3  * Copyright (c) Clemens Ladisch <clemens@ladisch.de>
      4  *
      5  * This program is free software: you can redistribute it and/or modify
      6  * it under the terms of the GNU General Public License as published by
      7  * the Free Software Foundation, either version 2 of the License, or
      8  * (at your option) any later version.
      9  *
     10  * This program is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     13  * GNU General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU General Public License
     16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
     17  */
     18 
     19 #include "aconfig.h"
     20 #include <assert.h>
     21 #include <menu.h>
     22 #include <unistd.h>
     23 #include "gettext_curses.h"
     24 #include "utils.h"
     25 #include "die.h"
     26 #include "mem.h"
     27 #include "colors.h"
     28 #include "widget.h"
     29 #include "textbox.h"
     30 #include "proc_files.h"
     31 
     32 static struct widget proc_widget;
     33 static ITEM *items[7];
     34 static unsigned int items_count;
     35 static MENU *menu;
     36 
     37 static void on_menu_key(int key)
     38 {
     39 	static const struct {
     40 		int key;
     41 		int request;
     42 	} key_map[] = {
     43 		{ KEY_DOWN, REQ_DOWN_ITEM },
     44 		{ KEY_UP, REQ_UP_ITEM },
     45 		{ KEY_HOME, REQ_FIRST_ITEM },
     46 		{ KEY_NPAGE, REQ_SCR_DPAGE },
     47 		{ KEY_PPAGE, REQ_SCR_UPAGE },
     48 		{ KEY_BEG, REQ_FIRST_ITEM },
     49 		{ KEY_END, REQ_LAST_ITEM },
     50 	};
     51 	unsigned int i;
     52 
     53 	for (i = 0; i < ARRAY_SIZE(key_map); ++i)
     54 		if (key_map[i].key == key) {
     55 			menu_driver(menu, key_map[i].request);
     56 			break;
     57 		}
     58 }
     59 
     60 static void on_handle_key(int key)
     61 {
     62 	ITEM *item;
     63 
     64 	switch (key) {
     65 	case 27:
     66 	case KEY_CANCEL:
     67 		proc_widget.close();
     68 		break;
     69 	case 10:
     70 	case 13:
     71 	case KEY_ENTER:
     72 		item = current_item(menu);
     73 		if (item)
     74 			show_textfile(item_name(item));
     75 		break;
     76 	default:
     77 		on_menu_key(key);
     78 		break;
     79 	}
     80 }
     81 
     82 static bool create(void)
     83 {
     84 	int rows, columns;
     85 	const char *title;
     86 
     87 	if (screen_lines < 3 || screen_cols < 20) {
     88 		proc_widget.close();
     89 		beep();
     90 		return FALSE;
     91 	}
     92 	scale_menu(menu, &rows, &columns);
     93 	rows += 2;
     94 	columns += 2;
     95 	if (rows > screen_lines)
     96 		rows = screen_lines;
     97 	if (columns > screen_cols)
     98 		columns = screen_cols;
     99 
    100 	widget_init(&proc_widget, rows, columns, SCREEN_CENTER, SCREEN_CENTER,
    101 		    attr_menu, WIDGET_BORDER | WIDGET_SUBWINDOW);
    102 
    103 	title = _("Select File");
    104 	mvwprintw(proc_widget.window, 0, (columns - 2 - get_mbs_width(title)) / 2, " %s ", title);
    105 	set_menu_win(menu, proc_widget.window);
    106 	set_menu_sub(menu, proc_widget.subwindow);
    107 	return TRUE;
    108 }
    109 
    110 static void on_window_size_changed(void)
    111 {
    112 	unpost_menu(menu);
    113 	if (!create())
    114 		return;
    115 	post_menu(menu);
    116 }
    117 
    118 static void on_close(void)
    119 {
    120 	unsigned int i;
    121 
    122 	unpost_menu(menu);
    123 	free_menu(menu);
    124 	for (i = 0; i < items_count; ++i)
    125 		free_item(items[i]);
    126 	widget_free(&proc_widget);
    127 }
    128 
    129 static void add_item(const char *file_name)
    130 {
    131 	if (access(file_name, F_OK) == 0) {
    132 		items[items_count] = new_item(file_name, NULL);
    133 		if (!items[items_count])
    134 			fatal_error("cannot create menu item");
    135 		++items_count;
    136 		assert(items_count < ARRAY_SIZE(items));
    137 	}
    138 }
    139 
    140 static struct widget proc_widget = {
    141 	.handle_key = on_handle_key,
    142 	.window_size_changed = on_window_size_changed,
    143 	.close = on_close,
    144 };
    145 
    146 void create_proc_files_list(void)
    147 {
    148 	items_count = 0;
    149 	add_item("/proc/asound/version");
    150 	add_item("/proc/asound/cards");
    151 	add_item("/proc/asound/devices");
    152 	add_item("/proc/asound/oss/devices");
    153 	add_item("/proc/asound/timers");
    154 	add_item("/proc/asound/pcm");
    155 	items[items_count] = NULL;
    156 
    157 	menu = new_menu(items);
    158 	if (!menu)
    159 		fatal_error("cannot create menu");
    160 	set_menu_fore(menu, attr_menu_selected);
    161 	set_menu_back(menu, attr_menu);
    162 	set_menu_mark(menu, NULL);
    163 	menu_opts_off(menu, O_SHOWDESC);
    164 
    165 	if (!create())
    166 		return;
    167 
    168 	post_menu(menu);
    169 }