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Terminal-based MPD client
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/*
* nncmpp -- the MPD client you never knew you needed
*
* Copyright (c) 2016 - 2020, Přemysl Eric Janouch <p@janouch.name>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
* OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#include "config.h"
// We "need" to have an enum for attributes before including liberty.
// Avoiding colours in the defaults here in order to support dumb terminals.
#define ATTRIBUTE_TABLE(XX) \
XX( NORMAL, normal, -1, -1, 0 ) \
XX( HIGHLIGHT, highlight, -1, -1, A_BOLD ) \
/* Gauge */ \
XX( ELAPSED, elapsed, -1, -1, A_REVERSE ) \
XX( REMAINS, remains, -1, -1, A_UNDERLINE ) \
/* Tab bar */ \
XX( TAB_BAR, tab_bar, -1, -1, A_REVERSE ) \
XX( TAB_ACTIVE, tab_active, -1, -1, A_UNDERLINE ) \
/* Listview */ \
XX( HEADER, header, -1, -1, A_UNDERLINE ) \
XX( EVEN, even, -1, -1, 0 ) \
XX( ODD, odd, -1, -1, 0 ) \
XX( DIRECTORY, directory, -1, -1, 0 ) \
XX( SELECTION, selection, -1, -1, A_REVERSE ) \
/* Cyan is good with both black and white.
* Can't use A_REVERSE because bold'd be bright.
* Unfortunately ran out of B&W attributes. */ \
XX( MULTISELECT, multiselect, -1, 6, 0 ) \
XX( SCROLLBAR, scrollbar, -1, -1, 0 ) \
/* These are for debugging only */ \
XX( WARNING, warning, 3, -1, 0 ) \
XX( ERROR, error, 1, -1, 0 ) \
XX( INCOMING, incoming, 2, -1, 0 ) \
XX( OUTGOING, outgoing, 4, -1, 0 )
enum
{
#define XX(name, config, fg_, bg_, attrs_) ATTRIBUTE_ ## name,
ATTRIBUTE_TABLE (XX)
#undef XX
ATTRIBUTE_COUNT
};
// My battle-tested C framework acting as a GLib replacement. Its one big
// disadvantage is missing support for i18n but that can eventually be added
// as an optional feature. Localised applications look super awkward, though.
// User data for logger functions to enable formatted logging
#define print_fatal_data ((void *) ATTRIBUTE_ERROR)
#define print_error_data ((void *) ATTRIBUTE_ERROR)
#define print_warning_data ((void *) ATTRIBUTE_WARNING)
#define LIBERTY_WANT_POLLER
#define LIBERTY_WANT_ASYNC
#define LIBERTY_WANT_PROTO_HTTP
#define LIBERTY_WANT_PROTO_MPD
#include "liberty/liberty.c"
#include "liberty/liberty-tui.c"
#define HAVE_LIBERTY
#include "line-editor.c"
#include <math.h>
#include <locale.h>
#include <termios.h>
#ifndef TIOCGWINSZ
#include <sys/ioctl.h>
#endif // ! TIOCGWINSZ
// ncurses is notoriously retarded for input handling, we need something
// different if only to receive mouse events reliably.
#include "termo.h"
// We need cURL to extract links from Internet stream playlists. It'd be way
// too much code to do this all by ourselves, and there's nothing better around.
#include <curl/curl.h>
#define APP_TITLE PROGRAM_NAME ///< Left top corner
// --- Utilities ---------------------------------------------------------------
// The standard endwin/refresh sequence makes the terminal flicker
static void
update_curses_terminal_size (void)
{
#if defined (HAVE_RESIZETERM) && defined (TIOCGWINSZ)
struct winsize size;
if (!ioctl (STDOUT_FILENO, TIOCGWINSZ, (char *) &size))
{
char *row = getenv ("LINES");
char *col = getenv ("COLUMNS");
unsigned long tmp;
resizeterm (
(row && xstrtoul (&tmp, row, 10)) ? tmp : size.ws_row,
(col && xstrtoul (&tmp, col, 10)) ? tmp : size.ws_col);
}
#else // HAVE_RESIZETERM && TIOCGWINSZ
endwin ();
refresh ();
#endif // HAVE_RESIZETERM && TIOCGWINSZ
}
static int64_t
clock_msec (clockid_t clock)
{
struct timespec tp;
hard_assert (clock_gettime (clock, &tp) != -1);
return (int64_t) tp.tv_sec * 1000 + (int64_t) tp.tv_nsec / 1000000;
}
static bool
xstrtoul_map (const struct str_map *map, const char *key, unsigned long *out)
{
const char *field = str_map_find (map, key);
return field && xstrtoul (out, field, 10);
}
static const char *
xbasename (const char *path)
{
const char *last_slash = strrchr (path, '/');
return last_slash ? last_slash + 1 : path;
}
static char *
latin1_to_utf8 (const char *latin1)
{
struct str converted = str_make ();
while (*latin1)
{
uint8_t c = *latin1++;
if (c < 0x80)
str_append_c (&converted, c);
else
{
str_append_c (&converted, 0xC0 | (c >> 6));
str_append_c (&converted, 0x80 | (c & 0x3F));
}
}
return str_steal (&converted);
}
static void
cstr_uncapitalize (char *s)
{
if (isupper (s[0]) && islower (s[1]))
s[0] = tolower_ascii (s[0]);
}
static int
print_curl_debug (CURL *easy, curl_infotype type, char *data, size_t len,
void *ud)
{
(void) easy;
(void) ud;
(void) type;
char copy[len + 1];
for (size_t i = 0; i < len; i++)
{
uint8_t c = data[i];
copy[i] = c >= 32 || c == '\n' ? c : '.';
}
copy[len] = '\0';
char *next;
for (char *p = copy; p; p = next)
{
if ((next = strchr (p, '\n')))
*next++ = '\0';
if (!*p)
continue;
if (!utf8_validate (p, strlen (p)))
{
char *fixed = latin1_to_utf8 (p);
print_debug ("cURL: %s", fixed);
free (fixed);
}
else
print_debug ("cURL: %s", p);
}
return 0;
}
static char *
mpd_parse_kv (char *line, char **value)
{
char *key = mpd_client_parse_kv (line, value);
if (!key) print_debug ("%s: %s", "erroneous MPD output", line);
return key;
}
// --- cURL async wrapper ------------------------------------------------------
// You are meant to subclass this structure, no user_data pointers needed
struct poller_curl_task;
/// Receives notification for finished transfers
typedef void (*poller_curl_done_fn)
(CURLMsg *msg, struct poller_curl_task *task);
struct poller_curl_task
{
CURL *easy; ///< cURL easy interface handle
char curl_error[CURL_ERROR_SIZE]; ///< cURL error info buffer
poller_curl_done_fn on_done; ///< Done callback
};
struct poller_curl_fd
{
LIST_HEADER (struct poller_curl_fd)
struct poller_fd fd; ///< Poller FD
};
struct poller_curl
{
struct poller *poller; ///< Parent poller
struct poller_timer timer; ///< cURL timer
CURLM *multi; ///< cURL multi interface handle
struct poller_curl_fd *fds; ///< List of all FDs
};
static void
poller_curl_collect (struct poller_curl *self, curl_socket_t s, int ev_bitmask)
{
int running = 0;
CURLMcode res;
// XXX: ignoring errors, in particular CURLM_CALL_MULTI_PERFORM
if ((res = curl_multi_socket_action (self->multi, s, ev_bitmask, &running)))
print_debug ("cURL: %s", curl_multi_strerror (res));
CURLMsg *msg;
while ((msg = curl_multi_info_read (self->multi, &running)))
if (msg->msg == CURLMSG_DONE)
{
struct poller_curl_task *task = NULL;
hard_assert (!curl_easy_getinfo
(msg->easy_handle, CURLINFO_PRIVATE, &task));
task->on_done (msg, task);
}
}
static void
poller_curl_on_socket (const struct pollfd *pfd, void *user_data)
{
int mask = 0;
if (pfd->revents & POLLIN) mask |= CURL_CSELECT_IN;
if (pfd->revents & POLLOUT) mask |= CURL_CSELECT_OUT;
if (pfd->revents & POLLERR) mask |= CURL_CSELECT_ERR;
poller_curl_collect (user_data, pfd->fd, mask);
}
static int
poller_curl_on_socket_action (CURL *easy, curl_socket_t s, int what,
void *user_data, void *socket_data)
{
(void) easy;
struct poller_curl *self = user_data;
struct poller_curl_fd *fd;
if (!(fd = socket_data))
{
fd = xmalloc (sizeof *fd);
LIST_PREPEND (self->fds, fd);
fd->fd = poller_fd_make (self->poller, s);
fd->fd.dispatcher = poller_curl_on_socket;
fd->fd.user_data = self;
curl_multi_assign (self->multi, s, fd);
}
if (what == CURL_POLL_REMOVE)
{
// Some annoying cURL bug. Never trust libraries.
fd->fd.closed = fcntl(fd->fd.fd, F_GETFL) < 0 && errno == EBADF;
poller_fd_reset (&fd->fd);
LIST_UNLINK (self->fds, fd);
free (fd);
}
else
{
short events = 0;
if (what == CURL_POLL_IN) events = POLLIN;
if (what == CURL_POLL_OUT) events = POLLOUT;
if (what == CURL_POLL_INOUT) events = POLLIN | POLLOUT;
poller_fd_set (&fd->fd, events);
}
return 0;
}
static void
poller_curl_on_timer (void *user_data)
{
poller_curl_collect (user_data, CURL_SOCKET_TIMEOUT, 0);
}
static int
poller_curl_on_timer_change (CURLM *multi, long timeout_ms, void *user_data)
{
(void) multi;
struct poller_curl *self = user_data;
if (timeout_ms < 0)
poller_timer_reset (&self->timer);
else
poller_timer_set (&self->timer, timeout_ms);
return 0;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static bool
poller_curl_init (struct poller_curl *self, struct poller *poller,
struct error **e)
{
memset (self, 0, sizeof *self);
if (!(self->multi = curl_multi_init ()))
return error_set (e, "cURL setup failed");
CURLMcode mres;
if ((mres = curl_multi_setopt (self->multi,
CURLMOPT_SOCKETFUNCTION, poller_curl_on_socket_action))
|| (mres = curl_multi_setopt (self->multi,
CURLMOPT_TIMERFUNCTION, poller_curl_on_timer_change))
|| (mres = curl_multi_setopt (self->multi, CURLMOPT_SOCKETDATA, self))
|| (mres = curl_multi_setopt (self->multi, CURLMOPT_TIMERDATA, self)))
{
curl_multi_cleanup (self->multi);
return error_set (e, "%s: %s",
"cURL setup failed", curl_multi_strerror (mres));
}
self->timer = poller_timer_make ((self->poller = poller));
self->timer.dispatcher = poller_curl_on_timer;
self->timer.user_data = self;
return true;
}
static void
poller_curl_free (struct poller_curl *self)
{
curl_multi_cleanup (self->multi);
poller_timer_reset (&self->timer);
LIST_FOR_EACH (struct poller_curl_fd, iter, self->fds)
{
poller_fd_reset (&iter->fd);
free (iter);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
/// Initialize a task with a new easy instance that can be used with the poller
static bool
poller_curl_spawn (struct poller_curl_task *task, struct error **e)
{
CURL *easy;
if (!(easy = curl_easy_init ()))
return error_set (e, "cURL setup failed");
// We already take care of SIGPIPE, and native DNS timeouts are only
// a problem for people without the AsynchDNS feature.
//
// Unfortunately, cURL doesn't allow custom callbacks for DNS.
// The most we could try is parse out the hostname and provide an address
// override for it using CURLOPT_RESOLVE. Or be our own SOCKS4A/5 proxy.
CURLcode res;
if ((res = curl_easy_setopt (easy, CURLOPT_NOSIGNAL, 1L))
|| (res = curl_easy_setopt (easy, CURLOPT_ERRORBUFFER, task->curl_error))
|| (res = curl_easy_setopt (easy, CURLOPT_PRIVATE, task)))
{
curl_easy_cleanup (easy);
return error_set (e, "%s", curl_easy_strerror (res));
}
task->easy = easy;
return true;
}
static bool
poller_curl_add (struct poller_curl *self, CURL *easy, struct error **e)
{
CURLMcode mres;
// "CURLMOPT_TIMERFUNCTION [...] will be called from within this function"
if ((mres = curl_multi_add_handle (self->multi, easy)))
return error_set (e, "%s", curl_multi_strerror (mres));
return true;
}
static bool
poller_curl_remove (struct poller_curl *self, CURL *easy, struct error **e)
{
CURLMcode mres;
if ((mres = curl_multi_remove_handle (self->multi, easy)))
return error_set (e, "%s", curl_multi_strerror (mres));
return true;
}
// --- Compact map -------------------------------------------------------------
// MPD provides us with a hefty amount of little key-value maps. The overhead
// of str_map for such constant (string -> string) maps is too high and it's
// much better to serialize them (mainly cache locality and memory efficiency).
//
// This isn't intended to be reusable and has case insensitivity built-in.
typedef uint8_t *compact_map_t; ///< Compacted (string -> string) map
static compact_map_t
compact_map (struct str_map *map)
{
struct str s = str_make ();
struct str_map_iter iter = str_map_iter_make (map);
char *value;
static const size_t zero = 0, alignment = sizeof zero;
while ((value = str_map_iter_next (&iter)))
{
size_t entry_len = iter.link->key_length + 1 + strlen (value) + 1;
size_t padding_len = (alignment - entry_len % alignment) % alignment;
entry_len += padding_len;
str_append_data (&s, &entry_len, sizeof entry_len);
str_append_printf (&s, "%s%c%s%c", iter.link->key, 0, value, 0);
str_append_data (&s, &zero, padding_len);
}
str_append_data (&s, &zero, sizeof zero);
return (compact_map_t) str_steal (&s);
}
static char *
compact_map_find (compact_map_t data, const char *needle)
{
size_t entry_len;
while ((entry_len = *(size_t *) data))
{
data += sizeof entry_len;
if (!strcasecmp_ascii (needle, (const char *) data))
return (char *) data + strlen (needle) + 1;
data += entry_len;
}
return NULL;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
struct item_list
{
compact_map_t *items; ///< Compacted (string -> string) maps
size_t len; ///< Length
size_t alloc; ///< Allocated items
};
static struct item_list
item_list_make (void)
{
struct item_list self = {};
self.items = xcalloc (sizeof *self.items, (self.alloc = 16));
return self;
}
static void
item_list_free (struct item_list *self)
{
for (size_t i = 0; i < self->len; i++)
free (self->items[i]);
free (self->items);
}
static bool
item_list_set (struct item_list *self, int i, struct str_map *item)
{
if (i < 0 || (size_t) i >= self->len)
return false;
free (self->items[i]);
self->items[i] = compact_map (item);
return true;
}
static compact_map_t
item_list_get (struct item_list *self, int i)
{
if (i < 0 || (size_t) i >= self->len || !self->items[i])
return NULL;
return self->items[i];
}
static void
item_list_resize (struct item_list *self, size_t len)
{
// Make the allocated array big enough but not too large
size_t new_alloc = self->alloc;
while (new_alloc < len)
new_alloc <<= 1;
while ((new_alloc >> 1) >= len
&& (new_alloc - len) >= 1024)
new_alloc >>= 1;
for (size_t i = len; i < self->len; i++)
free (self->items[i]);
if (new_alloc != self->alloc)
self->items = xreallocarray (self->items,
sizeof *self->items, (self->alloc = new_alloc));
for (size_t i = self->len; i < len; i++)
self->items[i] = NULL;
self->len = len;
}
// --- Application -------------------------------------------------------------
// Function names are prefixed mostly because of curses which clutters the
// global namespace and makes it harder to distinguish what functions relate to.
// The user interface is focused on conceptual simplicity. That is important
// since we're not using any TUI framework (which are mostly a lost cause to me
// in the post-Unicode era and not worth pursuing), and the code would get
// bloated and incomprehensible fast. We mostly rely on "row_buffer" to write
// text from left to right row after row while keeping track of cells.
//
// There is an independent top pane displaying general status information,
// followed by a tab bar and a listview served by a per-tab event handler.
//
// For simplicity, the listview can only work with items that are one row high.
struct tab;
enum action;
/// Try to handle an action in the tab
typedef bool (*tab_action_fn) (enum action action);
/// Draw an item to the screen using the row buffer API
typedef void (*tab_item_draw_fn)
(size_t item_index, struct row_buffer *buffer, int width);
struct tab
{
LIST_HEADER (struct tab)
char *name; ///< Visible identifier
size_t name_width; ///< Visible width of the name
char *header; ///< The header, should there be any
// Implementation:
tab_action_fn on_action; ///< User action handler callback
tab_item_draw_fn on_item_draw; ///< Item draw callback
// Provided by tab owner:
bool can_multiselect; ///< Multiple items can be selected
size_t item_count; ///< Total item count
// Managed by the common handler:
int item_top; ///< Index of the topmost item
int item_selected; ///< Index of the selected item
int item_mark; ///< Multiselect second point index
};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
enum player_state { PLAYER_STOPPED, PLAYER_PLAYING, PLAYER_PAUSED };
// Basically a container for most of the globals; no big sense in handing
// around a pointer to this, hence it is a simple global variable as well.
// There is enough global state as it is.
static struct app_context
{
// Event loop:
struct poller poller; ///< Poller
bool quitting; ///< Quit signal for the event loop
bool polling; ///< The event loop is running
struct poller_fd tty_event; ///< Terminal input event
struct poller_fd signal_event; ///< Signal FD event
struct poller_timer message_timer; ///< Message timeout
char *message; ///< Message to show in the statusbar
// Connection:
struct mpd_client client; ///< MPD client interface
struct poller_timer connect_event; ///< MPD reconnect timer
enum player_state state; ///< Player state
struct str_map playback_info; ///< Current song info
struct poller_timer elapsed_event; ///< Seconds elapsed event
int64_t elapsed_since; ///< Time of the next tick
// TODO: initialize these to -1
int song; ///< Current song index
int song_elapsed; ///< Song elapsed in seconds
int song_duration; ///< Song duration in seconds
int volume; ///< Current volume
struct item_list playlist; ///< Current playlist
uint32_t playlist_version; ///< Playlist version
int playlist_time; ///< Play time in seconds
// Data:
struct config config; ///< Program configuration
struct strv streams; ///< List of "name NUL URI NUL"
struct tab *help_tab; ///< Special help tab
struct tab *tabs; ///< All other tabs
struct tab *active_tab; ///< Active tab
struct tab *last_tab; ///< Previous tab
// Emulated widgets:
int header_height; ///< Height of the header
int tabs_offset; ///< Offset to tabs or -1
int controls_offset; ///< Offset to player controls or -1
int gauge_offset; ///< Offset to the gauge or -1
int gauge_width; ///< Width of the gauge, if present
struct line_editor editor; ///< Line editor
struct poller_idle refresh_event; ///< Refresh the screen
// Terminal:
termo_t *tk; ///< termo handle
struct poller_timer tk_timer; ///< termo timeout timer
bool locale_is_utf8; ///< The locale is Unicode
bool use_partial_boxes; ///< Use Unicode box drawing chars
struct attrs attrs[ATTRIBUTE_COUNT];
}
g;
/// Shortcut to retrieve named terminal attributes
#define APP_ATTR(name) g.attrs[ATTRIBUTE_ ## name].attrs
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
tab_init (struct tab *self, const char *name)
{
memset (self, 0, sizeof *self);
// Add some padding for decorative purposes
self->name = xstrdup_printf (" %s ", name);
// Assuming tab names are pure ASCII, otherwise this would be inaccurate
// and we'd need to filter it first to replace invalid chars with '?'
self->name_width = u8_strwidth ((uint8_t *) self->name, locale_charset ());
self->item_selected = 0;
self->item_mark = -1;
}
static void
tab_free (struct tab *self)
{
free (self->name);
}
static struct tab_range { int from, upto; }
tab_selection_range (struct tab *self)
{
if (self->item_selected < 0 || !self->item_count)
return (struct tab_range) { -1, -1 };
if (self->item_mark < 0)
return (struct tab_range) { self->item_selected, self->item_selected };
return (struct tab_range) { MIN (self->item_selected, self->item_mark),
MAX (self->item_selected, self->item_mark) };
}
// --- Configuration -----------------------------------------------------------
static struct config_schema g_config_settings[] =
{
{ .name = "address",
.comment = "Address to connect to the MPD server",
.type = CONFIG_ITEM_STRING,
.default_ = "\"localhost\"" },
{ .name = "password",
.comment = "Password to use for MPD authentication",
.type = CONFIG_ITEM_STRING },
{ .name = "root",
.comment = "Where all the files MPD is playing are located",
.type = CONFIG_ITEM_STRING },
{}
};
static struct config_schema g_config_colors[] =
{
#define XX(name_, config, fg_, bg_, attrs_) \
{ .name = #config, .type = CONFIG_ITEM_STRING },
ATTRIBUTE_TABLE (XX)
#undef XX
{}
};
static const char *
get_config_string (struct config_item *root, const char *key)
{
struct config_item *item = config_item_get (root, key, NULL);
hard_assert (item);
if (item->type == CONFIG_ITEM_NULL)
return NULL;
hard_assert (config_item_type_is_string (item->type));
return item->value.string.str;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
load_config_settings (struct config_item *subtree, void *user_data)
{
config_schema_apply_to_object (g_config_settings, subtree, user_data);
}
static void
load_config_colors (struct config_item *subtree, void *user_data)
{
config_schema_apply_to_object (g_config_colors, subtree, user_data);
// The attributes cannot be changed dynamically right now, so it doesn't
// make much sense to make use of "on_change" callbacks either.
// For simplicity, we should reload the entire table on each change anyway.
const char *value;
#define XX(name, config, fg_, bg_, attrs_) \
if ((value = get_config_string (subtree, #config))) \
g.attrs[ATTRIBUTE_ ## name] = attrs_decode (value);
ATTRIBUTE_TABLE (XX)
#undef XX
}
static int
app_casecmp (const uint8_t *a, const uint8_t *b)
{
int res;
// XXX: this seems to produce some strange results
if (u8_casecmp (a, strlen ((const char *) a), b, strlen ((const char *) b),
NULL, NULL, &res))
res = u8_strcmp (a, b);
return res;
}
static int
strv_sort_utf8_cb (const void *a, const void *b)
{
return app_casecmp (*(const uint8_t **) a, *(const uint8_t **) b);
}
static void
load_config_streams (struct config_item *subtree, void *user_data)
{
(void) user_data;
// XXX: we can't use the tab in load_config_streams() because it hasn't
// been initialized yet, and we cannot initialize it before the
// configuration has been loaded. Thus we load it into the app_context.
struct str_map_iter iter = str_map_iter_make (&subtree->value.object);
struct config_item *item;
while ((item = str_map_iter_next (&iter)))
if (!config_item_type_is_string (item->type))
print_warning ("`%s': stream URIs must be strings", iter.link->key);
else
{
strv_append_owned (&g.streams, xstrdup_printf ("%s%c%s",
iter.link->key, 0, item->value.string.str));
}
qsort (g.streams.vector, g.streams.len,
sizeof *g.streams.vector, strv_sort_utf8_cb);
}
static void
app_load_configuration (void)
{
struct config *config = &g.config;
config_register_module (config, "settings", load_config_settings, NULL);
config_register_module (config, "colors", load_config_colors, NULL);
config_register_module (config, "streams", load_config_streams, NULL);
// Bootstrap configuration, so that we can access schema items at all
config_load (config, config_item_object ());
char *filename = resolve_filename
(PROGRAM_NAME ".conf", resolve_relative_config_filename);
if (!filename)
return;
struct error *e = NULL;
struct config_item *root = config_read_from_file (filename, &e);
free (filename);
if (e)
{
print_error ("error loading configuration: %s", e->message);
error_free (e);
exit (EXIT_FAILURE);
}
if (root)
{
config_load (&g.config, root);
config_schema_call_changed (g.config.root);
}
}
// --- Application -------------------------------------------------------------
static void
app_init_attributes (void)
{
#define XX(name, config, fg_, bg_, attrs_) \
g.attrs[ATTRIBUTE_ ## name].fg = fg_; \
g.attrs[ATTRIBUTE_ ## name].bg = bg_; \
g.attrs[ATTRIBUTE_ ## name].attrs = attrs_;
ATTRIBUTE_TABLE (XX)
#undef XX
}
static void
app_init_context (void)
{
poller_init (&g.poller);
g.client = mpd_client_make (&g.poller);
g.config = config_make ();
g.streams = strv_make ();
g.playlist = item_list_make ();
g.playback_info = str_map_make (free);
g.playback_info.key_xfrm = tolower_ascii_strxfrm;
// This is also approximately what libunistring does internally,
// since the locale name is canonicalized by locale_charset().
// Note that non-Unicode locales are handled pretty inefficiently.
g.locale_is_utf8 = !strcasecmp_ascii (locale_charset (), "UTF-8");
// It doesn't work 100% (e.g. incompatible with undelining in urxvt)
// TODO: make this configurable
g.use_partial_boxes = g.locale_is_utf8;
app_init_attributes ();
}
static void
app_init_terminal (void)
{
TERMO_CHECK_VERSION;
if (!(g.tk = termo_new (STDIN_FILENO, NULL, 0)))
abort ();
if (!initscr () || nonl () == ERR)
abort ();
// By default we don't use any colors so they're not required...
if (start_color () == ERR
|| use_default_colors () == ERR
|| COLOR_PAIRS <= ATTRIBUTE_COUNT)
return;
for (int a = 0; a < ATTRIBUTE_COUNT; a++)
{
// ...thus we can reset back to defaults even after initializing some
if (g.attrs[a].fg >= COLORS || g.attrs[a].fg < -1
|| g.attrs[a].bg >= COLORS || g.attrs[a].bg < -1)
{
app_init_attributes ();
return;
}
init_pair (a + 1, g.attrs[a].fg, g.attrs[a].bg);
g.attrs[a].attrs |= COLOR_PAIR (a + 1);
}
}
static void
app_free_context (void)
{
mpd_client_free (&g.client);
str_map_free (&g.playback_info);
strv_free (&g.streams);
item_list_free (&g.playlist);
line_editor_free (&g.editor);
config_free (&g.config);
poller_free (&g.poller);
free (g.message);
if (g.tk)
termo_destroy (g.tk);
}
static void
app_quit (void)
{
g.quitting = true;
// So far there's nothing for us to wait on, so let's just stop looping;
// otherwise we might want to e.g. cleanly bring down the MPD interface
g.polling = false;
}
static bool
app_is_character_in_locale (ucs4_t ch)
{
// Avoid the overhead joined with calling iconv() for all characters.
if (g.locale_is_utf8)
return true;
// The library really creates a new conversion object every single time
// and doesn't provide any smarter APIs. Luckily, most users use UTF-8.
size_t len;
char *tmp = u32_conv_to_encoding (locale_charset (), iconveh_error,
&ch, 1, NULL, NULL, &len);
if (!tmp)
return false;
free (tmp);
return true;
}
// --- Rendering ---------------------------------------------------------------
static void
app_invalidate (void)
{
poller_idle_set (&g.refresh_event);
}
static void
app_flush_buffer (struct row_buffer *buf, int width, chtype attrs)
{
row_buffer_align (buf, width, attrs);
row_buffer_flush (buf);
row_buffer_free (buf);
}
/// Write the given UTF-8 string padded with spaces.
/// @param[in] attrs Text attributes for the text, including padding.
static void
app_write_line (const char *str, chtype attrs)
{
struct row_buffer buf = row_buffer_make ();
row_buffer_append (&buf, str, attrs);
app_flush_buffer (&buf, COLS, attrs);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
app_flush_header (struct row_buffer *buf, chtype attrs)
{
move (g.header_height++, 0);
app_flush_buffer (buf, COLS, attrs);
}
static void
app_draw_song_info (void)
{
compact_map_t map;
if (!(map = item_list_get (&g.playlist, g.song)))
return;
chtype attr_normal = APP_ATTR (NORMAL);
chtype attr_highlight = APP_ATTR (HIGHLIGHT);
char *title;
if ((title = compact_map_find (map, "title"))
|| (title = compact_map_find (map, "name"))
|| (title = compact_map_find (map, "file")))
{
struct row_buffer buf = row_buffer_make ();
row_buffer_append (&buf, title, attr_highlight);
app_flush_header (&buf, attr_normal);
}
char *artist = compact_map_find (map, "artist");
char *album = compact_map_find (map, "album");
if (!artist && !album)
return;
struct row_buffer buf = row_buffer_make ();
if (artist)
row_buffer_append_args (&buf, " by " + !buf.total_width, attr_normal,
artist, attr_highlight, NULL);
if (album)
row_buffer_append_args (&buf, " from " + !buf.total_width, attr_normal,
album, attr_highlight, NULL);
app_flush_header (&buf, attr_normal);
}
static char *
app_time_string (int seconds)
{
int minutes = seconds / 60; seconds %= 60;
int hours = minutes / 60; minutes %= 60;
struct str s = str_make ();
if (hours)
str_append_printf (&s, "%d:%02d:", hours, minutes);
else
str_append_printf (&s, "%d:", minutes);
str_append_printf (&s, "%02d", seconds);
return str_steal (&s);
}
static void
app_write_time (struct row_buffer *buf, int seconds, chtype attrs)
{
char *s = app_time_string (seconds);
row_buffer_append (buf, s, attrs);
free (s);
}
static void
app_write_gauge (struct row_buffer *buf, float ratio, int width)
{
if (ratio < 0) ratio = 0;
if (ratio > 1) ratio = 1;
// Always compute it in exactly eight times the resolution,
// because sometimes Unicode is even useful
int len_left = ratio * width * 8 + 0.5;
static const char *partials[] = { " ", "▏", "▎", "▍", "▌", "▋", "▊", "▉" };
int remainder = len_left % 8;
len_left /= 8;
const char *partial = NULL;
if (g.use_partial_boxes)
partial = partials[remainder];
else
len_left += remainder >= (int) 4;
int len_right = width - len_left;
row_buffer_space (buf, len_left, APP_ATTR (ELAPSED));
if (partial && len_right-- > 0)
row_buffer_append (buf, partial, APP_ATTR (REMAINS));
row_buffer_space (buf, len_right, APP_ATTR (REMAINS));
}
static void
app_draw_status (void)
{
if (g.state != PLAYER_STOPPED)
app_draw_song_info ();
chtype attr_normal = APP_ATTR (NORMAL);
chtype attr_highlight = APP_ATTR (HIGHLIGHT);
struct row_buffer buf = row_buffer_make ();
bool stopped = g.state == PLAYER_STOPPED;
chtype attr_song_action = stopped ? attr_normal : attr_highlight;
const char *toggle = g.state == PLAYER_PLAYING ? "||" : "|>";
row_buffer_append_args (&buf,
"<<", attr_song_action, " ", attr_normal,
toggle, attr_highlight, " ", attr_normal,
"[]", attr_song_action, " ", attr_normal,
">>", attr_song_action, " ", attr_normal,
NULL);
if (stopped)
row_buffer_append (&buf, "Stopped", attr_normal);
else
{
if (g.song_elapsed >= 0)
{
app_write_time (&buf, g.song_elapsed, attr_normal);
row_buffer_append (&buf, " ", attr_normal);
}
if (g.song_duration >= 1)
{
row_buffer_append (&buf, "/ ", attr_normal);
app_write_time (&buf, g.song_duration, attr_normal);
row_buffer_append (&buf, " ", attr_normal);
}
row_buffer_append (&buf, " ", attr_normal);
}
// It gets a bit complicated due to the only right-aligned item on the row
char *volume = NULL;
int remaining = COLS - buf.total_width;
if (g.volume >= 0)
{
volume = xstrdup_printf (" %3d%%", g.volume);
remaining -= strlen (volume);
}
if (!stopped && g.song_elapsed >= 0 && g.song_duration >= 1
&& remaining > 0)
{
g.gauge_offset = buf.total_width;
g.gauge_width = remaining;
app_write_gauge (&buf,
(float) g.song_elapsed / g.song_duration, remaining);
}
else
row_buffer_space (&buf, remaining, attr_normal);
if (volume)
{
row_buffer_append (&buf, volume, attr_normal);
free (volume);
}
g.controls_offset = g.header_height;
app_flush_header (&buf, attr_normal);
}
static void
app_draw_header (void)
{
g.header_height = 0;
g.tabs_offset = -1;
g.controls_offset = -1;
g.gauge_offset = -1;
g.gauge_width = 0;
switch (g.client.state)
{
case MPD_CONNECTED:
app_draw_status ();
break;
case MPD_CONNECTING:
move (g.header_height++, 0);
app_write_line ("Connecting to MPD...", APP_ATTR (NORMAL));
break;
case MPD_DISCONNECTED:
move (g.header_height++, 0);
app_write_line ("Disconnected", APP_ATTR (NORMAL));
}
chtype attrs[2] = { APP_ATTR (TAB_BAR), APP_ATTR (TAB_ACTIVE) };
// The help tab is disguised so that it's not too intruding
struct row_buffer buf = row_buffer_make ();
row_buffer_append (&buf, APP_TITLE, attrs[g.active_tab == g.help_tab]);
row_buffer_append (&buf, " ", attrs[false]);
g.tabs_offset = g.header_height;
LIST_FOR_EACH (struct tab, iter, g.tabs)
row_buffer_append (&buf, iter->name, attrs[iter == g.active_tab]);
app_flush_header (&buf, attrs[false]);
const char *header = g.active_tab->header;
if (header)
{
buf = row_buffer_make ();
row_buffer_append (&buf, header, APP_ATTR (HEADER));
app_flush_header (&buf, APP_ATTR (HEADER));
}
}
static int
app_fitting_items (void)
{
// The raw number of items that would have fit on the terminal
return LINES - g.header_height - 1 /* status bar */;
}
static int
app_visible_items (void)
{
return MAX (0, app_fitting_items ());
}
/// Figure out scrollbar appearance. @a s is the minimal slider length as well
/// as the scrollbar resolution per @a visible item.
struct scrollbar { long length, start; }
app_compute_scrollbar (struct tab *tab, long visible, long s)
{
long top = tab->item_top, total = tab->item_count;
if (total < visible)
return (struct scrollbar) { 0, 0 };
if (visible == 1)
return (struct scrollbar) { s, 0 };
if (visible == 2)
return (struct scrollbar) { s, top >= total / 2 ? s : 0 };
// Only be at the top or bottom when the top or bottom item can be seen.
// The algorithm isn't optimal but it's a bitch to get right.
double available_length = s * visible - 2 - s + 1;
double lenf = s + available_length * visible / total, length = 0.;
long offset = 1 + available_length * top / total + modf (lenf, &length);
if (top == 0)
return (struct scrollbar) { length, 0 };
if (top + visible >= total)
return (struct scrollbar) { length, s * visible - length };
return (struct scrollbar) { length, offset };
}
static void
app_draw_scrollbar (void)
{
// This assumes that we can write to the one-before-last column,
// i.e. that it's not covered by any double-wide character (and that
// ncurses comes to the right results when counting characters).
//
// We could also precompute the scrollbar and append it to each row
// as we render them, plus all the unoccupied rows.
struct tab *tab = g.active_tab;
int visible_items = app_visible_items ();
hard_assert (tab->item_count != 0);
if (!g.use_partial_boxes)
{
struct scrollbar bar = app_compute_scrollbar (tab, visible_items, 1);
for (int row = 0; row < visible_items; row++)
{
move (g.header_height + row, COLS - 1);
if (row < bar.start || row >= bar.start + bar.length)
addch (' ' | APP_ATTR (SCROLLBAR));
else
addch (' ' | APP_ATTR (SCROLLBAR) | A_REVERSE);
}
return;
}
struct scrollbar bar = app_compute_scrollbar (tab, visible_items, 8);
bar.length += bar.start;
int start_part = bar.start % 8; bar.start /= 8;
int end_part = bar.length % 8; bar.length /= 8;
// Even with this, the solid part must be at least one character high
static const char *partials[] = { "█", "▇", "▆", "▅", "▄", "▃", "▂", "▁" };
for (int row = 0; row < visible_items; row++)
{
chtype attrs = APP_ATTR (SCROLLBAR);
if (row > bar.start && row <= bar.length)
attrs ^= A_REVERSE;
const char *c = " ";
if (row == bar.start) c = partials[start_part];
if (row == bar.length) c = partials[end_part];
move (g.header_height + row, COLS - 1);
struct row_buffer buf = row_buffer_make ();
row_buffer_append (&buf, c, attrs);
row_buffer_flush (&buf);
row_buffer_free (&buf);
}
}
static void
app_draw_view (void)
{
move (g.header_height, 0);
clrtobot ();
struct tab *tab = g.active_tab;
bool want_scrollbar = (int) tab->item_count > app_visible_items ();
int view_width = COLS - want_scrollbar;
int to_show =
MIN (app_fitting_items (), (int) tab->item_count - tab->item_top);
for (int row = 0; row < to_show; row++)
{
int item_index = tab->item_top + row;
int row_attrs = (item_index & 1) ? APP_ATTR (ODD) : APP_ATTR (EVEN);
bool override_colors = true;
if (item_index == tab->item_selected)
row_attrs = APP_ATTR (SELECTION);
else if (tab->item_mark > -1 &&
((item_index >= tab->item_mark && item_index <= tab->item_selected)
|| (item_index >= tab->item_selected && item_index <= tab->item_mark)))
row_attrs = APP_ATTR (MULTISELECT);
else
override_colors = false;
struct row_buffer buf = row_buffer_make ();
tab->on_item_draw (item_index, &buf, view_width);
// Combine attributes used by the handler with the defaults.
// Avoiding attrset() because of row_buffer_flush().
for (size_t i = 0; i < buf.chars_len; i++)
{
chtype *attrs = &buf.chars[i].attrs;
if (override_colors)
*attrs = (*attrs & ~(A_COLOR | A_REVERSE)) | row_attrs;
else if ((*attrs & A_COLOR) && (row_attrs & A_COLOR))
*attrs |= (row_attrs & ~A_COLOR);
else
*attrs |= row_attrs;
}
move (g.header_height + row, 0);
app_flush_buffer (&buf, view_width, row_attrs);
}
if (want_scrollbar)
app_draw_scrollbar ();
}
static void
app_write_mpd_status_playlist (struct row_buffer *buf)
{
struct str stats = str_make ();
if (g.playlist.len == 1)
str_append_printf (&stats, "1 song ");
else
str_append_printf (&stats, "%zu songs ", g.playlist.len);
int hours = g.playlist_time / 3600;
int minutes = g.playlist_time % 3600 / 60;
if (hours || minutes)
{
str_append_c (&stats, ' ');
if (hours == 1)
str_append_printf (&stats, " 1 hour");
else if (hours)
str_append_printf (&stats, " %d hours", hours);
if (minutes == 1)
str_append_printf (&stats, " 1 minute");
else if (minutes)
str_append_printf (&stats, " %d minutes", minutes);
}
row_buffer_append (buf, stats.str, APP_ATTR (NORMAL));
str_free (&stats);
}
static void
app_write_mpd_status (struct row_buffer *buf)
{
struct str_map *map = &g.playback_info;
if (g.active_tab->item_mark > -1)
{
struct tab_range r = tab_selection_range (g.active_tab);
char *msg = xstrdup_printf (r.from == r.upto
? "Selected %d item" : "Selected %d items", r.upto - r.from + 1);
row_buffer_append (buf, msg, APP_ATTR (HIGHLIGHT));
free (msg);
}
else if (str_map_find (map, "updating_db"))
row_buffer_append (buf, "Updating database...", APP_ATTR (NORMAL));
else
app_write_mpd_status_playlist (buf);
const char *s;
bool repeat = (s = str_map_find (map, "repeat")) && strcmp (s, "0");
bool random = (s = str_map_find (map, "random")) && strcmp (s, "0");
bool single = (s = str_map_find (map, "single")) && strcmp (s, "0");
bool consume = (s = str_map_find (map, "consume")) && strcmp (s, "0");
struct row_buffer right = row_buffer_make ();
chtype a[2] = { APP_ATTR (NORMAL), APP_ATTR (HIGHLIGHT) };
if (repeat) row_buffer_append_args (&right,
" ", APP_ATTR (NORMAL), "repeat", a[repeat], NULL);
if (random) row_buffer_append_args (&right,
" ", APP_ATTR (NORMAL), "random", a[random], NULL);
if (single) row_buffer_append_args (&right,
" ", APP_ATTR (NORMAL), "single", a[single], NULL);
if (consume) row_buffer_append_args (&right,
" ", APP_ATTR (NORMAL), "consume", a[consume], NULL);
row_buffer_space (buf,
MAX (0, COLS - buf->total_width - right.total_width),
APP_ATTR (NORMAL));
row_buffer_append_buffer (buf, &right);
row_buffer_free (&right);
}
static void
app_draw_statusbar (void)
{
int caret = -1;
struct row_buffer buf = row_buffer_make ();
if (g.message)
row_buffer_append (&buf, g.message, APP_ATTR (HIGHLIGHT));
else if (g.editor.line)
caret = line_editor_write (&g.editor, &buf, COLS, APP_ATTR (HIGHLIGHT));
else if (g.client.state == MPD_CONNECTED)
app_write_mpd_status (&buf);
move (LINES - 1, 0);
app_flush_buffer (&buf, COLS, APP_ATTR (NORMAL));
curs_set (0);
if (caret != -1)
{
move (LINES - 1, caret);
curs_set (1);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
/// Checks what items are visible and returns if the range was alright
static bool
app_fix_view_range (void)
{
struct tab *tab = g.active_tab;
if (tab->item_top < 0)
{
tab->item_top = 0;
return false;
}
// If the contents are at least as long as the screen, always fill it
int max_item_top = (int) tab->item_count - app_visible_items ();
// But don't let that suggest a negative offset
max_item_top = MAX (max_item_top, 0);
if (tab->item_top > max_item_top)
{
tab->item_top = max_item_top;
return false;
}
return true;
}
static void
app_on_refresh (void *user_data)
{
(void) user_data;
poller_idle_reset (&g.refresh_event);
app_draw_header ();
app_fix_view_range();
app_draw_view ();
app_draw_statusbar ();
refresh ();
}
// --- Actions -----------------------------------------------------------------
/// Scroll down (positive) or up (negative) @a n items
static bool
app_scroll (int n)
{
g.active_tab->item_top += n;
app_invalidate ();
return app_fix_view_range ();
}
static void
app_ensure_selection_visible (void)
{
struct tab *tab = g.active_tab;
if (tab->item_selected < 0 || !tab->item_count)
return;
int too_high = tab->item_top - tab->item_selected;
if (too_high > 0)
app_scroll (-too_high);
int too_low = tab->item_selected
- (tab->item_top + app_visible_items () - 1);
if (too_low > 0)
app_scroll (too_low);
}
static bool
app_move_selection (int diff)
{
struct tab *tab = g.active_tab;
int fixed = tab->item_selected + diff;
fixed = MIN (fixed, (int) tab->item_count - 1);
fixed = MAX (fixed, 0);
bool result = !diff || tab->item_selected != fixed;
tab->item_selected = fixed;
app_invalidate ();
app_ensure_selection_visible ();
return result;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
app_prepend_tab (struct tab *tab)
{
LIST_PREPEND (g.tabs, tab);
app_invalidate ();
}
static void
app_switch_tab (struct tab *tab)
{
if (tab == g.active_tab)
return;
g.last_tab = g.active_tab;
g.active_tab = tab;
app_invalidate ();
}
static bool
app_goto_tab (int tab_index)
{
int i = 0;
LIST_FOR_EACH (struct tab, iter, g.tabs)
if (i++ == tab_index)
{
app_switch_tab (iter);
return true;
}
return false;
}
// --- Actions -----------------------------------------------------------------
#define ACTIONS(XX) \
XX( NONE, Do nothing ) \
\
XX( QUIT, Quit ) \
XX( REDRAW, Redraw screen ) \
XX( TAB_HELP, Switch to help tab ) \
XX( TAB_LAST, Switch to last tab ) \
XX( TAB_PREVIOUS, Switch to previous tab ) \
XX( TAB_NEXT, Switch to next tab ) \
\
XX( MPD_TOGGLE, Toggle play/pause ) \
XX( MPD_STOP, Stop playback ) \
XX( MPD_PREVIOUS, Previous song ) \
XX( MPD_NEXT, Next song ) \
XX( MPD_BACKWARD, Seek backwards ) \
XX( MPD_FORWARD, Seek forwards ) \
XX( MPD_VOLUME_UP, Increase volume ) \
XX( MPD_VOLUME_DOWN, Decrease volume ) \
\
XX( MPD_SEARCH, Global search ) \
XX( MPD_ADD, Add selection to playlist ) \
XX( MPD_REPLACE, Replace playlist ) \
XX( MPD_REPEAT, Toggle repeat ) \
XX( MPD_RANDOM, Toggle random playback ) \
XX( MPD_SINGLE, Toggle single song playback ) \
XX( MPD_CONSUME, Toggle consume ) \
XX( MPD_UPDATE_DB, Update MPD database ) \
XX( MPD_COMMAND, Send raw command to MPD ) \
\
XX( CHOOSE, Choose item ) \
XX( DELETE, Delete item ) \
XX( UP, Go up a level ) \
XX( MULTISELECT, Toggle multiselect ) \
\
XX( SCROLL_UP, Scroll up ) \
XX( SCROLL_DOWN, Scroll down ) \
XX( MOVE_UP, Move selection up ) \
XX( MOVE_DOWN, Move selection down ) \
\
XX( GOTO_TOP, Go to top ) \
XX( GOTO_BOTTOM, Go to bottom ) \
XX( GOTO_ITEM_PREVIOUS, Go to previous item ) \
XX( GOTO_ITEM_NEXT, Go to next item ) \
XX( GOTO_PAGE_PREVIOUS, Go to previous page ) \
XX( GOTO_PAGE_NEXT, Go to next page ) \
\
XX( GOTO_VIEW_TOP, Select top item ) \
XX( GOTO_VIEW_CENTER, Select center item ) \
XX( GOTO_VIEW_BOTTOM, Select bottom item ) \
\
XX( EDITOR_CONFIRM, Confirm input ) \
\
XX( EDITOR_B_CHAR, Go back a character ) \
XX( EDITOR_F_CHAR, Go forward a character ) \
XX( EDITOR_B_WORD, Go back a word ) \
XX( EDITOR_F_WORD, Go forward a word ) \
XX( EDITOR_HOME, Go to start of line ) \
XX( EDITOR_END, Go to end of line ) \
\
XX( EDITOR_B_DELETE, Delete last character ) \
XX( EDITOR_F_DELETE, Delete next character ) \
XX( EDITOR_B_KILL_WORD, Delete last word ) \
XX( EDITOR_B_KILL_LINE, Delete everything up to BOL ) \
XX( EDITOR_F_KILL_LINE, Delete everything up to EOL )
enum action
{
#define XX(name, description) ACTION_ ## name,
ACTIONS (XX)
#undef XX
ACTION_COUNT
};
static struct action_info
{
const char *name; ///< Name for user bindings
const char *description; ///< Human-readable description
}
g_actions[] =
{
#define XX(name, description) { #name, #description },
ACTIONS (XX)
#undef XX
};
/// Accept a more human format of action-name instead of ACTION_NAME
static int action_toupper (int c) { return c == '-' ? '_' : toupper_ascii (c); }
static int
action_resolve (const char *name)
{
const unsigned char *s = (const unsigned char *) name;
for (int i = 0; i < ACTION_COUNT; i++)
{
const char *target = g_actions[i].name;
for (size_t k = 0; action_toupper (s[k]) == target[k]; k++)
if (!s[k] && !target[k])
return i;
}
return -1;
}
// --- User input handling -----------------------------------------------------
static void
mpd_client_vsend_command (struct mpd_client *self, va_list ap)
{
struct strv v = strv_make ();
const char *command;
while ((command = va_arg (ap, const char *)))
strv_append (&v, command);
mpd_client_send_commandv (self, v.vector);
strv_free (&v);
}
/// Send a command to MPD without caring about the response
static bool mpd_client_send_simple (struct mpd_client *self, ...)
ATTRIBUTE_SENTINEL;
static void
mpd_on_simple_response (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
(void) data;
(void) user_data;
if (!response->success)
print_error ("%s: %s", "command failed", response->message_text);
}
static bool
mpd_client_send_simple (struct mpd_client *self, ...)
{
if (self->state != MPD_CONNECTED)
return false;
va_list ap;
va_start (ap, self);
mpd_client_vsend_command (self, ap);
va_end (ap);
mpd_client_add_task (self, mpd_on_simple_response, NULL);
mpd_client_idle (self, 0);
return true;
}
#define MPD_SIMPLE(...) \
mpd_client_send_simple (&g.client, __VA_ARGS__, NULL)
static bool
app_setvol (int value)
{
char *volume = xstrdup_printf ("%d", MAX (0, MIN (100, value)));
bool result = g.volume >= 0 && MPD_SIMPLE ("setvol", volume);
free (volume);
return result;
}
static void
app_on_editor_end (bool confirmed)
{
struct mpd_client *c = &g.client;
if (!confirmed)
return;
size_t len;
char *u8 = (char *) u32_to_u8 (g.editor.line, g.editor.len + 1, NULL, &len);
mpd_client_send_command_raw (c, u8);
free (u8);
mpd_client_add_task (c, mpd_on_simple_response, NULL);
mpd_client_idle (c, 0);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static bool
app_mpd_toggle (const char *name)
{
const char *s = str_map_find (&g.playback_info, name);
bool value = s && strcmp (s, "0");
return MPD_SIMPLE (name, value ? "0" : "1");
}
static bool
app_process_action (enum action action)
{
// First let the tab try to handle this
struct tab *tab = g.active_tab;
if (tab->on_action && tab->on_action (action))
{
app_invalidate ();
return true;
}
switch (action)
{
case ACTION_NONE:
return true;
case ACTION_QUIT:
// It is a pseudomode, avoid surprising the user
if (tab->item_mark > -1)
{
tab->item_mark = -1;
app_invalidate ();
return true;
}
app_quit ();
return true;
case ACTION_REDRAW:
clear ();
app_invalidate ();
return true;
case ACTION_MPD_COMMAND:
line_editor_start (&g.editor, ':');
g.editor.on_end = app_on_editor_end;
app_invalidate ();
return true;
default:
return false;
case ACTION_MULTISELECT:
if (!tab->can_multiselect
|| !tab->item_count || tab->item_selected < 0)
return false;
app_invalidate ();
if (tab->item_mark > -1)
tab->item_mark = -1;
else
tab->item_mark = tab->item_selected;
return true;
case ACTION_TAB_LAST:
if (!g.last_tab)
return false;
app_switch_tab (g.last_tab);
return true;
case ACTION_TAB_HELP:
app_switch_tab (g.help_tab);
return true;
case ACTION_TAB_PREVIOUS:
if (g.active_tab == g.help_tab)
return false;
if (!g.active_tab->prev)
app_switch_tab (g.help_tab);
else
app_switch_tab (g.active_tab->prev);
return true;
case ACTION_TAB_NEXT:
if (g.active_tab == g.help_tab)
app_switch_tab (g.tabs);
else if (g.active_tab->next)
app_switch_tab (g.active_tab->next);
else
return false;
return true;
case ACTION_MPD_TOGGLE:
if (g.state == PLAYER_PLAYING) return MPD_SIMPLE ("pause", "1");
if (g.state == PLAYER_PAUSED) return MPD_SIMPLE ("pause", "0");
return MPD_SIMPLE ("play");
case ACTION_MPD_STOP: return MPD_SIMPLE ("stop");
case ACTION_MPD_PREVIOUS: return MPD_SIMPLE ("previous");
case ACTION_MPD_NEXT: return MPD_SIMPLE ("next");
case ACTION_MPD_FORWARD: return MPD_SIMPLE ("seekcur", "+10");
case ACTION_MPD_BACKWARD: return MPD_SIMPLE ("seekcur", "-10");
case ACTION_MPD_REPEAT: return app_mpd_toggle ("repeat");
case ACTION_MPD_RANDOM: return app_mpd_toggle ("random");
case ACTION_MPD_SINGLE: return app_mpd_toggle ("single");
case ACTION_MPD_CONSUME: return app_mpd_toggle ("consume");
case ACTION_MPD_UPDATE_DB: return MPD_SIMPLE ("update");
case ACTION_MPD_VOLUME_UP: return app_setvol (g.volume + 10);
case ACTION_MPD_VOLUME_DOWN: return app_setvol (g.volume - 10);
// XXX: these should rather be parametrized
case ACTION_SCROLL_UP: return app_scroll (-3);
case ACTION_SCROLL_DOWN: return app_scroll (3);
case ACTION_GOTO_TOP:
if (tab->item_count)
{
g.active_tab->item_selected = 0;
app_ensure_selection_visible ();
app_invalidate ();
}
return true;
case ACTION_GOTO_BOTTOM:
if (tab->item_count)
{
g.active_tab->item_selected =
MAX (0, (int) g.active_tab->item_count - 1);
app_ensure_selection_visible ();
app_invalidate ();
}
return true;
case ACTION_GOTO_ITEM_PREVIOUS: return app_move_selection (-1);
case ACTION_GOTO_ITEM_NEXT: return app_move_selection (1);
case ACTION_GOTO_PAGE_PREVIOUS:
app_scroll (-app_visible_items ());
return app_move_selection (-app_visible_items ());
case ACTION_GOTO_PAGE_NEXT:
app_scroll (app_visible_items ());
return app_move_selection (app_visible_items ());
case ACTION_GOTO_VIEW_TOP:
g.active_tab->item_selected = g.active_tab->item_top;
return app_move_selection (0);
case ACTION_GOTO_VIEW_CENTER:
g.active_tab->item_selected = g.active_tab->item_top;
return app_move_selection (MAX (0, app_visible_items () / 2 - 1));
case ACTION_GOTO_VIEW_BOTTOM:
g.active_tab->item_selected = g.active_tab->item_top;
return app_move_selection (MAX (0, app_visible_items () - 1));
}
return false;
}
static bool
app_editor_process_action (enum action action)
{
app_invalidate ();
switch (action)
{
case ACTION_QUIT:
line_editor_abort (&g.editor, false);
g.editor.on_end = NULL;
return true;
case ACTION_EDITOR_CONFIRM:
line_editor_abort (&g.editor, true);
g.editor.on_end = NULL;
return true;
default:
return false;
case ACTION_EDITOR_B_CHAR:
return line_editor_action (&g.editor, LINE_EDITOR_B_CHAR);
case ACTION_EDITOR_F_CHAR:
return line_editor_action (&g.editor, LINE_EDITOR_F_CHAR);
case ACTION_EDITOR_B_WORD:
return line_editor_action (&g.editor, LINE_EDITOR_B_WORD);
case ACTION_EDITOR_F_WORD:
return line_editor_action (&g.editor, LINE_EDITOR_F_WORD);
case ACTION_EDITOR_HOME:
return line_editor_action (&g.editor, LINE_EDITOR_HOME);
case ACTION_EDITOR_END:
return line_editor_action (&g.editor, LINE_EDITOR_END);
case ACTION_EDITOR_B_DELETE:
return line_editor_action (&g.editor, LINE_EDITOR_B_DELETE);
case ACTION_EDITOR_F_DELETE:
return line_editor_action (&g.editor, LINE_EDITOR_F_DELETE);
case ACTION_EDITOR_B_KILL_WORD:
return line_editor_action (&g.editor, LINE_EDITOR_B_KILL_WORD);
case ACTION_EDITOR_B_KILL_LINE:
return line_editor_action (&g.editor, LINE_EDITOR_B_KILL_LINE);
case ACTION_EDITOR_F_KILL_LINE:
return line_editor_action (&g.editor, LINE_EDITOR_F_KILL_LINE);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static bool
app_process_left_mouse_click (int line, int column, bool double_click)
{
if (line == g.controls_offset)
{
// XXX: there could be a push_widget(buf, text, attrs, handler)
// function to help with this but it might not be worth it
enum action action = ACTION_NONE;
if (column >= 0 && column <= 1) action = ACTION_MPD_PREVIOUS;
if (column >= 3 && column <= 4) action = ACTION_MPD_TOGGLE;
if (column >= 6 && column <= 7) action = ACTION_MPD_STOP;
if (column >= 9 && column <= 10) action = ACTION_MPD_NEXT;
if (action)
return app_process_action (action);
int gauge_offset = column - g.gauge_offset;
if (g.gauge_offset < 0
|| gauge_offset < 0 || gauge_offset >= g.gauge_width)
return false;
float position = (float) gauge_offset / g.gauge_width;
if (g.song_duration >= 1)
{
char *where = xstrdup_printf ("%f", position * g.song_duration);
MPD_SIMPLE ("seekcur", where);
free (where);
}
}
else if (line == g.tabs_offset)
{
struct tab *winner = NULL;
int indent = strlen (APP_TITLE);
if (column < indent)
{
app_switch_tab (g.help_tab);
return true;
}
for (struct tab *iter = g.tabs; !winner && iter; iter = iter->next)
{
if (column < (indent += iter->name_width))
winner = iter;
}
if (!winner)
return false;
app_switch_tab (winner);
}
else if (line >= g.header_height)
{
struct tab *tab = g.active_tab;
int row_index = line - g.header_height;
if (row_index < 0
|| row_index >= (int) tab->item_count - tab->item_top)
return false;
// TODO: handle the scrollbar a bit better than this
int visible_items = app_visible_items ();
if ((int) tab->item_count > visible_items && column == COLS - 1)
tab->item_top = (float) row_index / visible_items
* (int) tab->item_count - visible_items / 2;
else
tab->item_selected = row_index + tab->item_top;
app_invalidate ();
if (double_click)
app_process_action (ACTION_CHOOSE);
}
return true;
}
static bool
app_process_mouse (termo_mouse_event_t type, int line, int column, int button,
bool double_click)
{
if (type != TERMO_MOUSE_PRESS)
return true;
if (g.editor.line)
line_editor_abort (&g.editor, false);
if (button == 1)
return app_process_left_mouse_click (line, column, double_click);
else if (button == 4)
return app_process_action (ACTION_SCROLL_UP);
else if (button == 5)
return app_process_action (ACTION_SCROLL_DOWN);
return false;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static struct binding
{
termo_key_t decoded; ///< Decoded key definition
enum action action; ///< Action to take
int order; ///< Order for stable sorting
}
*g_normal_keys, *g_editor_keys;
static size_t g_normal_keys_len, g_editor_keys_len;
static struct binding_default
{
const char *key; ///< Key definition
enum action action; ///< Action to take
}
g_normal_defaults[] =
{
{ "Escape", ACTION_QUIT },
{ "q", ACTION_QUIT },
{ "C-l", ACTION_REDRAW },
{ "M-Tab", ACTION_TAB_LAST },
{ "F1", ACTION_TAB_HELP },
{ "C-Left", ACTION_TAB_PREVIOUS },
{ "C-Right", ACTION_TAB_NEXT },
{ "C-PageUp", ACTION_TAB_PREVIOUS },
{ "C-PageDown", ACTION_TAB_NEXT },
{ "Home", ACTION_GOTO_TOP },
{ "End", ACTION_GOTO_BOTTOM },
{ "M-<", ACTION_GOTO_TOP },
{ "M->", ACTION_GOTO_BOTTOM },
{ "g", ACTION_GOTO_TOP },
{ "G", ACTION_GOTO_BOTTOM },
{ "S-Up", ACTION_MOVE_UP },
{ "S-Down", ACTION_MOVE_DOWN },
{ "Up", ACTION_GOTO_ITEM_PREVIOUS },
{ "Down", ACTION_GOTO_ITEM_NEXT },
{ "k", ACTION_GOTO_ITEM_PREVIOUS },
{ "j", ACTION_GOTO_ITEM_NEXT },
{ "PageUp", ACTION_GOTO_PAGE_PREVIOUS },
{ "PageDown", ACTION_GOTO_PAGE_NEXT },
{ "C-p", ACTION_GOTO_ITEM_PREVIOUS },
{ "C-n", ACTION_GOTO_ITEM_NEXT },
{ "C-b", ACTION_GOTO_PAGE_PREVIOUS },
{ "C-f", ACTION_GOTO_PAGE_NEXT },
{ "C-y", ACTION_SCROLL_UP },
{ "C-e", ACTION_SCROLL_DOWN },
{ "H", ACTION_GOTO_VIEW_TOP },
{ "M", ACTION_GOTO_VIEW_CENTER },
{ "L", ACTION_GOTO_VIEW_BOTTOM },
// Not sure how to set these up, they're pretty arbitrary so far
{ "Enter", ACTION_CHOOSE },
{ "Delete", ACTION_DELETE },
{ "d", ACTION_DELETE },
{ "Backspace", ACTION_UP },
{ "v", ACTION_MULTISELECT },
{ "/", ACTION_MPD_SEARCH },
{ "a", ACTION_MPD_ADD },
{ "r", ACTION_MPD_REPLACE },
{ ":", ACTION_MPD_COMMAND },
{ "<", ACTION_MPD_PREVIOUS },
{ ">", ACTION_MPD_NEXT },
{ "Left", ACTION_MPD_PREVIOUS },
{ "Right", ACTION_MPD_NEXT },
{ "M-Left", ACTION_MPD_BACKWARD },
{ "M-Right", ACTION_MPD_FORWARD },
{ "h", ACTION_MPD_PREVIOUS },
{ "l", ACTION_MPD_NEXT },
{ "Space", ACTION_MPD_TOGGLE },
{ "C-Space", ACTION_MPD_STOP },
{ "u", ACTION_MPD_UPDATE_DB },
{ "M-PageUp", ACTION_MPD_VOLUME_UP },
{ "M-PageDown", ACTION_MPD_VOLUME_DOWN },
},
g_editor_defaults[] =
{
{ "Left", ACTION_EDITOR_B_CHAR },
{ "Right", ACTION_EDITOR_F_CHAR },
{ "C-b", ACTION_EDITOR_B_CHAR },
{ "C-f", ACTION_EDITOR_F_CHAR },
{ "M-b", ACTION_EDITOR_B_WORD },
{ "M-f", ACTION_EDITOR_F_WORD },
{ "Home", ACTION_EDITOR_HOME },
{ "End", ACTION_EDITOR_END },
{ "C-a", ACTION_EDITOR_HOME },
{ "C-e", ACTION_EDITOR_END },
{ "C-h", ACTION_EDITOR_B_DELETE },
{ "DEL", ACTION_EDITOR_B_DELETE },
{ "Backspace", ACTION_EDITOR_B_DELETE },
{ "C-d", ACTION_EDITOR_F_DELETE },
{ "Delete", ACTION_EDITOR_F_DELETE },
{ "C-u", ACTION_EDITOR_B_KILL_LINE },
{ "C-k", ACTION_EDITOR_F_KILL_LINE },
{ "C-w", ACTION_EDITOR_B_KILL_WORD },
{ "C-g", ACTION_QUIT },
{ "Escape", ACTION_QUIT },
{ "Enter", ACTION_EDITOR_CONFIRM },
};
static int
app_binding_cmp (const void *a, const void *b)
{
const struct binding *aa = a, *bb = b;
int cmp = termo_keycmp (g.tk, &aa->decoded, &bb->decoded);
return cmp ? cmp : bb->order - aa->order;
}
static bool
app_next_binding (struct str_map_iter *iter, termo_key_t *key, int *action)
{
struct config_item *v;
while ((v = str_map_iter_next (iter)))
{
*action = ACTION_NONE;
if (*termo_strpkey_utf8 (g.tk,
iter->link->key, key, TERMO_FORMAT_ALTISMETA))
print_error ("%s: invalid binding", iter->link->key);
else if (v->type == CONFIG_ITEM_NULL)
return true;
else if (v->type != CONFIG_ITEM_STRING)
print_error ("%s: bindings must be strings", iter->link->key);
else if ((*action = action_resolve (v->value.string.str)) >= 0)
return true;
else
print_error ("%s: unknown action: %s",
iter->link->key, v->value.string.str);
}
return false;
}
static struct binding *
app_init_bindings (const char *keymap,
struct binding_default *defaults, size_t defaults_len, size_t *result_len)
{
ARRAY (struct binding, a)
ARRAY_INIT_SIZED (a, defaults_len);
// Order for stable sorting
size_t order = 0;
termo_key_t decoded;
for (size_t i = 0; i < defaults_len; i++)
{
hard_assert (!*termo_strpkey_utf8 (g.tk,
defaults[i].key, &decoded, TERMO_FORMAT_ALTISMETA));
a[a_len++] = (struct binding) { decoded, defaults[i].action, order++ };
}
struct config_item *root = config_item_get (g.config.root, keymap, NULL);
if (root && root->type == CONFIG_ITEM_OBJECT)
{
struct str_map_iter iter = str_map_iter_make (&root->value.object);
ARRAY_RESERVE (a, iter.map->len);
int action;
while (app_next_binding (&iter, &decoded, &action))
a[a_len++] = (struct binding) { decoded, action, order++ };
}
// Use the helper field to use the last mappings of identical bindings
size_t out = 0;
qsort (a, a_len, sizeof *a, app_binding_cmp);
for (size_t in = 0; in < a_len; in++)
{
a[in].order = 0;
if (!out || termo_keycmp (g.tk, &a[in].decoded, &a[out - 1].decoded))
a[out++] = a[in];
}
*result_len = out;
return a;
}
static bool
app_process_termo_event (termo_key_t *event)
{
struct binding dummy = { *event, 0, 0 }, *binding;
if (g.editor.line)
{
if ((binding = bsearch (&dummy, g_editor_keys, g_editor_keys_len,
sizeof *binding, app_binding_cmp)))
return app_editor_process_action (binding->action);
if (event->type != TERMO_TYPE_KEY || event->modifiers != 0)
return false;
line_editor_insert (&g.editor, event->code.codepoint);
app_invalidate ();
return true;
}
if ((binding = bsearch (&dummy, g_normal_keys, g_normal_keys_len,
sizeof *binding, app_binding_cmp)))
return app_process_action (binding->action);
// TODO: parametrize actions, put this among other bindings
if (!(event->modifiers & ~TERMO_KEYMOD_ALT)
&& event->code.codepoint >= '0'
&& event->code.codepoint <= '9')
{
int n = event->code.codepoint - '0';
if (app_goto_tab ((n == 0 ? 10 : n) - 1))
return true;
}
return false;
}
// --- Current tab -------------------------------------------------------------
static struct tab g_current_tab;
static void
current_tab_on_item_draw (size_t item_index, struct row_buffer *buffer,
int width)
{
// TODO: configurable output, maybe dynamically sized columns
int length_len = 1 /*separator */ + 2 /* h */ + 3 /* m */+ 3 /* s */;
compact_map_t map = item_list_get (&g.playlist, item_index);
const char *artist = compact_map_find (map, "artist");
const char *title = compact_map_find (map, "title");
chtype attrs = (int) item_index == g.song ? A_BOLD : 0;
if (artist && title)
row_buffer_append_args (buffer,
artist, attrs, " - ", attrs, title, attrs, NULL);
else
row_buffer_append (buffer, compact_map_find (map, "file"), attrs);
row_buffer_align (buffer, width - length_len, attrs);
char *s = NULL;
unsigned long n;
const char *time = compact_map_find (map, "time");
if (!time || !xstrtoul (&n, time, 10) || !(s = app_time_string (n)))
s = xstrdup ("?");
char *right_aligned = xstrdup_printf ("%*s", length_len, s);
row_buffer_append (buffer, right_aligned, attrs);
free (right_aligned);
free (s);
}
static void
mpd_on_move_response (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
(void) data;
*(bool *) user_data = false;
if (!response->success)
print_error ("%s: %s", "command failed", response->message_text);
}
static void
current_tab_move (int from, int to)
{
compact_map_t map;
const char *id;
if (!(map = item_list_get (&g.playlist, from))
|| !(id = compact_map_find (map, "id")))
return;
char *target_str = xstrdup_printf ("%d", to);
mpd_client_send_command (&g.client, "moveid", id, target_str, NULL);
free (target_str);
}
static bool
current_tab_move_selection (int diff)
{
static bool already_moving;
if (already_moving || diff == 0)
return true;
struct mpd_client *c = &g.client;
if (c->state != MPD_CONNECTED)
return false;
struct tab *tab = &g_current_tab;
struct tab_range range = tab_selection_range (tab);
if (range.from + diff < 0
|| range.upto + diff >= (int) tab->item_count)
return false;
mpd_client_list_begin (c);
if (diff < 0)
for (int i = range.from; i <= range.upto; i++)
current_tab_move (i, i + diff);
else
for (int i = range.upto; i >= range.from; i--)
current_tab_move (i, i + diff);
mpd_client_list_end (c);
mpd_client_add_task (c, mpd_on_move_response, &already_moving);
mpd_client_idle (c, 0);
return already_moving = true;
}
static bool
current_tab_on_action (enum action action)
{
struct tab *tab = &g_current_tab;
compact_map_t map = item_list_get (&g.playlist, tab->item_selected);
switch (action)
{
const char *id;
case ACTION_MOVE_UP:
return current_tab_move_selection (-1);
case ACTION_MOVE_DOWN:
return current_tab_move_selection (+1);
case ACTION_CHOOSE:
tab->item_mark = -1;
return map && (id = compact_map_find (map, "id"))
&& MPD_SIMPLE ("playid", id);
case ACTION_DELETE:
{
struct mpd_client *c = &g.client;
struct tab_range range = tab_selection_range (tab);
if (range.from < 0 || c->state != MPD_CONNECTED)
return false;
mpd_client_list_begin (c);
for (int i = range.from; i <= range.upto; i++)
{
if ((map = item_list_get (&g.playlist, i))
&& (id = compact_map_find (map, "id")))
mpd_client_send_command (c, "deleteid", id, NULL);
}
mpd_client_list_end (c);
mpd_client_add_task (c, mpd_on_simple_response, NULL);
mpd_client_idle (c, 0);
return true;
}
default:
return false;
}
}
static void
current_tab_update (void)
{
g_current_tab.item_count = g.playlist.len;
g_current_tab.item_mark =
MIN ((int) g.playlist.len - 1, g_current_tab.item_mark);
app_invalidate ();
}
static struct tab *
current_tab_init (void)
{
struct tab *super = &g_current_tab;
tab_init (super, "Current");
super->can_multiselect = true;
super->on_action = current_tab_on_action;
super->on_item_draw = current_tab_on_item_draw;
return super;
}
// --- Library tab -------------------------------------------------------------
struct library_level
{
LIST_HEADER (struct library_level)
int item_top; ///< Stored state
int item_selected; ///< Stored state
char path[]; ///< Path of the level
};
static struct
{
struct tab super; ///< Parent class
struct str path; ///< Current path
struct strv items; ///< Current items (type, name, path)
struct library_level *above; ///< Upper levels
bool searching; ///< Search mode is active
}
g_library_tab;
enum
{
// This list is also ordered by ASCII and important for sorting
LIBRARY_ROOT = '/', ///< Root entry
LIBRARY_UP = '^', ///< Upper directory
LIBRARY_DIR = 'd', ///< Directory
LIBRARY_FILE = 'f' ///< File
};
struct library_tab_item
{
int type; ///< Type of the item
const char *name; ///< Visible name
const char *path; ///< MPD path
};
static void
library_tab_add (int type, const char *name, const char *path)
{
strv_append_owned (&g_library_tab.items,
xstrdup_printf ("%c%s%c%s", type, name, 0, path));
}
static struct library_tab_item
library_tab_resolve (const char *raw)
{
struct library_tab_item item;
item.type = *raw