alsa-utils/alsamixer/device_name.c

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/*
* device_name_form.c - ask for sound control device name
* Copyright (c) Clemens Ladisch <clemens@ladisch.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "aconfig.h"
#include <stdlib.h>
#include <string.h>
#include CURSESINC
#include <form.h>
#include "gettext_curses.h"
#include "die.h"
#include "mem.h"
#include "utils.h"
#include "colors.h"
#include "widget.h"
#include "mixer_widget.h"
#include "card_select.h"
#include "device_name.h"
static struct widget form_widget;
static FIELD *fields[3];
static FORM *form;
static char *dup_current_name(void)
{
int rows, cols, max, i;
char *s;
if (form_driver(form, REQ_VALIDATION) == E_OK) {
dynamic_field_info(fields[1], &rows, &cols, &max);
s = ccalloc(1, cols + 1);
memcpy(s, field_buffer(fields[1], 0), cols);
for (i = strlen(s) - 1; i >= 0 && s[i] == ' '; --i)
s[i] = '\0';
return s;
} else {
return cstrdup("");
}
}
static void on_key_enter(void)
{
char *s;
bool ok;
s = dup_current_name();
ok = select_card_by_name(s);
free(s);
if (ok) {
form_widget.close();
close_card_select_list();
}
}
static void on_form_key(int key)
{
static const struct {
int key;
int request;
} key_map[] = {
{ KEY_LEFT, REQ_PREV_CHAR },
{ KEY_RIGHT, REQ_NEXT_CHAR },
{ KEY_HOME, REQ_BEG_FIELD },
{ KEY_BACKSPACE, REQ_DEL_PREV },
{ 127, REQ_DEL_PREV },
{ KEY_DC, REQ_DEL_CHAR },
{ KEY_BEG, REQ_BEG_FIELD },
{ KEY_END, REQ_END_FIELD },
};
unsigned int i;
if (key >= 32 && key < 256 && key != 127) {
form_driver(form, key);
return;
}
for (i = 0; i < ARRAY_SIZE(key_map); ++i)
if (key_map[i].key == key) {
form_driver(form, key_map[i].request);
break;
}
}
static void on_handle_key(int key)
{
switch (key) {
case 27:
case KEY_CANCEL:
form_widget.close();
break;
case 10:
case 13:
case KEY_ENTER:
on_key_enter();
break;
default:
on_form_key(key);
break;
}
}
static bool create(void)
{
const char *title;
if (screen_lines < 6 || screen_cols < 36) {
form_widget.close();
beep();
return FALSE;
}
widget_init(&form_widget,
6, 36, SCREEN_CENTER, SCREEN_CENTER,
attrs.textbox, WIDGET_BORDER | WIDGET_SUBWINDOW | WIDGET_CURSOR_VISIBLE);
title = _("Sound Card");
mvwprintw(form_widget.window, 0, (36 - 2 - get_mbs_width(title)) / 2, " %s ", title);
set_form_win(form, form_widget.window);
set_form_sub(form, form_widget.subwindow);
return TRUE;
}
static void on_window_size_changed(void)
{
form_driver(form, REQ_VALIDATION); /* save field value */
unpost_form(form);
if (!create())
return;
/*
* This call fails because ncurses does not allow changing options of
* the current field, and we cannot change the current field because
* there is only one. The only way to make this work would be to throw
* away and recreate all fields.
*/
field_opts_off(fields[1], O_BLANK);
post_form(form);
}
static void on_close(void)
{
unpost_form(form);
free_form(form);
free_field(fields[0]);
free_field(fields[1]);
widget_free(&form_widget);
}
static struct widget form_widget = {
.handle_key = on_handle_key,
.window_size_changed = on_window_size_changed,
.close = on_close,
};
void create_device_name_form(void)
{
fields[0] = new_field(1, 32, 1, 1, 0, 0);
if (!fields[0])
fatal_error("cannot create field");
field_opts_off(fields[0], O_ACTIVE|O_EDIT);
set_field_fore(fields[0], attrs.textbox);
set_field_back(fields[0], attrs.textbox);
set_field_buffer(fields[0], 0, _("Device name:"));
fields[1] = new_field(1, 32, 2, 1, 0, 0);
if (!fields[1])
fatal_error("cannot create field");
field_opts_off(fields[1], O_AUTOSKIP|O_NULLOK|O_STATIC);
set_field_fore(fields[1], attrs.textfield);
set_field_back(fields[1], attrs.textfield);
set_field_buffer(fields[1], 0, mixer_device_name);
form = new_form(fields);
if (!form)
fatal_error("cannot create form");
if (!create())
return;
post_form(form);
}