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nncmpp/nncmpp.c

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/*
* nncmpp -- the MPD client you never knew you needed
*
* Copyright (c) 2016 - 2022, 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 ) \
/* This ought to be indicative enough. */ \
XX( DEFOCUSED, defocused, -1, -1, A_UNDERLINE ) \
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>
#include <sys/ioctl.h>
// ncurses is notoriously retarded for input handling, we need something
// different if only to receive mouse events reliably.
//
// 2021 update: ncurses is mostly reliable now, though rxvt-unicode only
// supports the 1006 mode that ncurses also supports mode starting with 9.25.
#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>
// The spectrum analyser requires a DFT transform. The FFTW library is fairly
// efficient, and doesn't have a requirement on the number of bins.
#ifdef WITH_FFTW
#include <fftw3.h>
#endif // WITH_FFTW
// Remote MPD control needs appropriate volume controls.
#ifdef WITH_PULSE
#include "liberty/liberty-pulse.c"
#include <pulse/context.h>
#include <pulse/error.h>
#include <pulse/introspect.h>
#include <pulse/subscribe.h>
#include <pulse/sample.h>
#endif // WITH_PULSE
// Elementary port of the TUI to X11.
#ifdef WITH_X11
#include <X11/Xatom.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/XKBlib.h>
#include <X11/Xft/Xft.h>
#endif // WITH_X11
#define APP_TITLE PROGRAM_NAME ///< Left top corner
#include "nncmpp-actions.h"
// --- Utilities ---------------------------------------------------------------
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 *xstrdup0 (const char *s) { return s ? xstrdup (s) : NULL; }
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] = !iscntrl_ascii (c) || 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;
}
static void
mpd_read_time (const char *value, int *sec, int *optional_msec)
{
if (!value)
return;
char *end = NULL;
long n = strtol (value, &end, 10);
if (n < 0 || (*end && *end != '.'))
return;
int msec = 0;
if (*end == '.')
{
// In practice, MPD always uses three decimal digits
size_t digits = strspn (++end, "0123456789");
if (end[digits])
return;
if (digits--) msec += (*end++ - '0') * 100;
if (digits--) msec += (*end++ - '0') * 10;
if (digits--) msec += *end++ - '0';
}
*sec = MIN (INT_MAX, n);
if (optional_msec)
*optional_msec = msec;
}
// --- 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
// TODO: also make sure to dispose of them at the end of the program
int registered; ///< Number of attached easy handles
};
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);
self->multi = NULL;
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));
self->registered++;
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));
self->registered--;
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;
}
// --- Spectrum analyzer -------------------------------------------------------
// See http://www.zytrax.com/tech/audio/equalization.html
// for a good write-up about this problem domain
#ifdef WITH_FFTW
struct spectrum
{
int sampling_rate; ///< Number of samples per seconds
int channels; ///< Number of sampled channels
int bits; ///< Number of bits per sample
int bars; ///< Number of output vertical bars
int bins; ///< Number of DFT bins
int useful_bins; ///< Bins up to the Nyquist frequency
int samples; ///< Number of windows to average
float accumulator_scale; ///< Scaling factor for accum. values
int *top_bins; ///< Top DFT bin index for each bar
char *rendered; ///< String buffer for the "render"
float *spectrum; ///< The "render" as normalized floats
void *buffer; ///< Input buffer
size_t buffer_len; ///< Input buffer fill level
size_t buffer_size; ///< Input buffer size
/// Decode the respective part of the buffer into the second half of data
void (*decode) (struct spectrum *, int sample);
float *data; ///< Normalized audio data
float *window; ///< Sampled window function
float *windowed; ///< data * window
fftwf_complex *out; ///< DFT output
fftwf_plan p; ///< DFT plan/FFTW configuration
float *accumulator; ///< Accumulated powers of samples
};
// - - Windows - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Out: float[n] of 0..1
static void
window_hann (float *coefficients, size_t n)
{
for (size_t i = 0; i < n; i++)
{
float sine = sin (M_PI * i / n);
coefficients[i] = sine * sine;
}
}
// In: float[n] of -1..1, float[n] of 0..1; out: float[n] of -1..1
static void
window_apply (const float *in, const float *coefficients, float *out, size_t n)
{
for (size_t i = 0; i < n; i++)
out[i] = in[i] * coefficients[i];
}
// In: float[n] of 0..1; out: float 0..n, describing the coherent gain
static float
window_coherent_gain (const float *in, size_t n)
{
float sum = 0;
for (size_t i = 0; i < n; i++)
sum += in[i];
return sum;
}
// - - Decoding - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
spectrum_decode_8 (struct spectrum *s, int sample)
{
size_t n = s->useful_bins;
float *data = s->data + n;
for (int8_t *p = (int8_t *) s->buffer + sample * n * s->channels;
n--; p += s->channels)
{
int32_t acc = 0;
for (int ch = 0; ch < s->channels; ch++)
acc += p[ch];
*data++ = (float) acc / s->channels / -INT8_MIN;
}
}
static void
spectrum_decode_16 (struct spectrum *s, int sample)
{
size_t n = s->useful_bins;
float *data = s->data + n;
for (int16_t *p = (int16_t *) s->buffer + sample * n * s->channels;
n--; p += s->channels)
{
int32_t acc = 0;
for (int ch = 0; ch < s->channels; ch++)
acc += p[ch];
*data++ = (float) acc / s->channels / -INT16_MIN;
}
}
static void
spectrum_decode_16_2 (struct spectrum *s, int sample)
{
size_t n = s->useful_bins;
float *data = s->data + n;
for (int16_t *p = (int16_t *) s->buffer + sample * n * 2; n--; p += 2)
*data++ = ((int32_t) p[0] + p[1]) / 2. / -INT16_MIN;
}
// - - Spectrum analysis - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static const char *spectrum_bars[] =
{ " ", "▁", "▂", "▃", "▄", "▅", "▆", "▇", "█" };
/// Assuming the input buffer is full, updates the rendered spectrum
static void
spectrum_sample (struct spectrum *s)
{
memset (s->accumulator, 0, sizeof *s->accumulator * s->useful_bins);
// Credit for the algorithm goes to Audacity's /src/SpectrumAnalyst.cpp,
// apparently Welch's method
for (int sample = 0; sample < s->samples; sample++)
{
// We use 50% overlap and start with data from the last run (if any)
memmove (s->data, s->data + s->useful_bins,
sizeof *s->data * s->useful_bins);
s->decode (s, sample);
window_apply (s->data, s->window, s->windowed, s->bins);
fftwf_execute (s->p);
for (int bin = 0; bin < s->useful_bins; bin++)
{
// out[0][0] is the DC component, not useful to us
float re = s->out[bin + 1][0];
float im = s->out[bin + 1][1];
s->accumulator[bin] += re * re + im * im;
}
}
int last_bin = 0;
char *p = s->rendered;
for (int bar = 0; bar < s->bars; bar++)
{
int top_bin = s->top_bins[bar];
// Think of this as accumulating energies within bands,
// so that it matches our non-linear hearing--there's no averaging.
// For more precision, we could employ an "equal loudness contour".
float acc = 0;
for (int bin = last_bin; bin < top_bin; bin++)
acc += s->accumulator[bin];
last_bin = top_bin;
float db = 10 * log10f (acc * s->accumulator_scale);
if (db > 0)
db = 0;
// Assuming decibels are always negative (i.e., properly normalized).
// The division defines the cutoff: 8 * 7 = 56 dB of range.
int height = N_ELEMENTS (spectrum_bars) - 1 + (int) (db / 7);
p += strlen (strcpy (p, spectrum_bars[MAX (height, 0)]));
// Even with slightly the higher display resolutions provided by X11,
// 60 dB roughly covers the useful range.
s->spectrum[bar] = MAX (0, 1 + db / 60);
}
}
static bool
spectrum_init (struct spectrum *s, char *format, int bars, int fps,
struct error **e)
{
errno = 0;
long sampling_rate, bits, channels;
if (!format
|| (sampling_rate = strtol (format, &format, 10), *format++ != ':')
|| (bits = strtol (format, &format, 10), *format++ != ':')
|| (channels = strtol (format, &format, 10), *format)
|| errno != 0)
return error_set (e, "invalid format, expected RATE:BITS:CHANNELS");
if (sampling_rate < 20000 || sampling_rate > INT_MAX)
return error_set (e, "unsupported sampling rate (%ld)", sampling_rate);
if (bits != 8 && bits != 16)
return error_set (e, "unsupported bit count (%ld)", bits);
if (channels < 1 || channels > INT_MAX)
return error_set (e, "no channels to sample (%ld)", channels);
if (bars < 1 || bars > 12)
return error_set (e, "requested too few or too many bars (%d)", bars);
// All that can fail henceforth is memory allocation
*s = (struct spectrum)
{
.sampling_rate = sampling_rate,
.bits = bits,
.channels = channels,
.bars = bars,
};
// The number of bars is always smaller than that of the samples (bins).
// Let's start with the equation of the top FFT bin to use for a given bar:
// top_bin = (num_bins + 1) ^ (bar / num_bars) - 1
// N.b. if we didn't subtract, the power function would make this ≥ 1.
// N.b. we then also need to extend the range by the same amount.
//
// We need the amount of bins for the first bar to be at least one:
// 1 ≤ (num_bins + 1) ^ (1 / num_bars) - 1
//
// Solving with Wolfram Alpha gives us:
// num_bins ≥ (2 ^ num_bars) - 1 [for y > 0]
//
// And we need to remember that half of the FFT bins are useless/missing--
// FFTW skips useless points past the Nyquist frequency.
int necessary_bins = 2 << s->bars;
// Discard frequencies above 20 kHz, which take up a constant ratio
// of all bins, given by the sampling rate. A more practical/efficient
// solution would be to just handle 96/192/... kHz rates as bitshifts.
//
// Filtering out sub-20 Hz frequencies would be even more wasteful than
// this wild DFT size, so we don't even try. While we may just shift
// the lowest used bin easily within the extra range provided by this
// extension (the Nyquist is usually above 22 kHz, and it hardly matters
// if we go a bit beyond 20 kHz in the last bin), for a small number of bars
// the first bin already includes audible frequencies, and even for larger
// numbers it wouldn't be too accurate. An exact solution would require
// having the amount of bins be strictly a factor of Nyquist / 20 (stemming
// from the equation 20 = Nyquist / bins). Since log2(44100 / 2 / 20) > 10,
// it would be fairly expensive, and somewhat slowly updating. Always.
// (Note that you can increase window overlap to get smoother framerates,
// but it would remain laggy.)
double audible_ratio = s->sampling_rate / 2. / 20000;
s->bins = ceil (necessary_bins * MAX (audible_ratio, 1));
s->useful_bins = s->bins / 2;
int used_bins = necessary_bins / 2;
s->rendered = xcalloc (sizeof *s->rendered, s->bars * 3 + 1);
s->spectrum = xcalloc (sizeof *s->spectrum, s->bars);
s->top_bins = xcalloc (sizeof *s->top_bins, s->bars);
for (int bar = 0; bar < s->bars; bar++)
{
int top_bin = floor (pow (used_bins + 1, (bar + 1.) / s->bars)) - 1;
s->top_bins[bar] = MIN (top_bin, used_bins);
}
s->samples = s->sampling_rate / s->bins * 2 / MAX (fps, 1);
if (s->samples < 1)
s->samples = 1;
// XXX: we average the channels but might want to average the DFT results
if (s->bits == 8) s->decode = spectrum_decode_8;
if (s->bits == 16) s->decode = spectrum_decode_16;
// Micro-optimize to achieve some piece of mind; it's weak but measurable
if (s->bits == 16 && s->channels == 2)
s->decode = spectrum_decode_16_2;
s->buffer_size = s->samples * s->useful_bins * s->bits / 8 * s->channels;
s->buffer = xcalloc (1, s->buffer_size);
// Prepare the window
s->window = xcalloc (sizeof *s->window, s->bins);
window_hann (s->window, s->bins);
// Multiply by 2 for only using half of the DFT's result, then adjust to
// the total energy of the window. Both squared, because the accumulator
// contains squared values. Compute the average, and convert to decibels.
// See also the mildly confusing https://dsp.stackexchange.com/a/14945.
float coherent_gain = window_coherent_gain (s->window, s->bins);
s->accumulator_scale = 2 * 2 / coherent_gain / coherent_gain / s->samples;
s->data = xcalloc (sizeof *s->data, s->bins);
s->windowed = fftw_malloc (sizeof *s->windowed * s->bins);
s->out = fftw_malloc (sizeof *s->out * (s->useful_bins + 1));
s->p = fftwf_plan_dft_r2c_1d (s->bins, s->windowed, s->out, FFTW_MEASURE);
s->accumulator = xcalloc (sizeof *s->accumulator, s->useful_bins);
return true;
}
static void
spectrum_free (struct spectrum *s)
{
free (s->accumulator);
fftwf_destroy_plan (s->p);
fftw_free (s->out);
fftw_free (s->windowed);
free (s->data);
free (s->window);
#if 0
// We don't particularly want to discard wisdom.
fftwf_cleanup ();
#endif
free (s->rendered);
free (s->spectrum);
free (s->top_bins);
free (s->buffer);
memset (s, 0, sizeof *s);
}
#endif // WITH_FFTW
// --- PulseAudio --------------------------------------------------------------
#ifdef WITH_PULSE
struct pulse
{
struct poller_timer make_context; ///< Event to establish connection
pa_mainloop_api *api; ///< PulseAudio event loop proxy
pa_context *context; ///< PulseAudio connection context
uint32_t sink_candidate; ///< Used while searching for MPD
uint32_t sink; ///< The relevant sink or -1
pa_cvolume sink_volume; ///< Current volume
bool sink_muted; ///< Currently muted?
void (*on_update) (void); ///< Update callback
};
static void
pulse_on_sink_info (pa_context *context, const pa_sink_info *info, int eol,
void *userdata)
{
(void) context;
(void) eol;
struct pulse *self = userdata;
if (info)
{
self->sink_volume = info->volume;
self->sink_muted = !!info->mute;
self->on_update ();
}
}
static void
pulse_update_from_sink (struct pulse *self)
{
if (self->sink == PA_INVALID_INDEX)
return;
pa_operation_unref (pa_context_get_sink_info_by_index
(self->context, self->sink, pulse_on_sink_info, self));
}
static void
pulse_on_sink_input_info (pa_context *context,
const struct pa_sink_input_info *info, int eol, void *userdata)
{
(void) context;
(void) eol;
struct pulse *self = userdata;
if (!info)
{
if ((self->sink = self->sink_candidate) != PA_INVALID_INDEX)
pulse_update_from_sink (self);
else
self->on_update ();
return;
}
// TODO: also save info->mute as a different mute level,
// and perhaps info->index (they can appear and disappear)
const char *name =
pa_proplist_gets (info->proplist, PA_PROP_APPLICATION_NAME);
if (name && !strcmp (name, "Music Player Daemon"))
self->sink_candidate = info->sink;
}
static void
pulse_read_sink_inputs (struct pulse *self)
{
self->sink_candidate = PA_INVALID_INDEX;
pa_operation_unref (pa_context_get_sink_input_info_list
(self->context, pulse_on_sink_input_info, self));
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
pulse_on_event (pa_context *context, pa_subscription_event_type_t event,
uint32_t index, void *userdata)
{
(void) context;
struct pulse *self = userdata;
switch (event & PA_SUBSCRIPTION_EVENT_FACILITY_MASK)
{
case PA_SUBSCRIPTION_EVENT_SINK_INPUT:
pulse_read_sink_inputs (self);
break;
case PA_SUBSCRIPTION_EVENT_SINK:
if (index == self->sink)
pulse_update_from_sink (self);
}
}
static void
pulse_on_subscribe_finish (pa_context *context, int success, void *userdata)
{
(void) context;
struct pulse *self = userdata;
if (success)
pulse_read_sink_inputs (self);
else
{
print_debug ("PulseAudio failed to subscribe for events");
self->on_update ();
pa_context_disconnect (context);
}
}
static void
pulse_on_context_state_change (pa_context *context, void *userdata)
{
struct pulse *self = userdata;
switch (pa_context_get_state (context))
{
case PA_CONTEXT_FAILED:
case PA_CONTEXT_TERMINATED:
print_debug ("PulseAudio context failed or has been terminated");
pa_context_unref (context);
self->context = NULL;
self->sink = PA_INVALID_INDEX;
self->on_update ();
// Retry after an arbitrary delay of 5 seconds
poller_timer_set (&self->make_context, 5000);
break;
case PA_CONTEXT_READY:
pa_context_set_subscribe_callback (context, pulse_on_event, userdata);
pa_operation_unref (pa_context_subscribe (context,
PA_SUBSCRIPTION_MASK_SINK | PA_SUBSCRIPTION_MASK_SINK_INPUT,
pulse_on_subscribe_finish, userdata));
default:
break;
}
}
static void
pulse_make_context (void *user_data)
{
struct pulse *self = user_data;
self->context = pa_context_new (self->api, PROGRAM_NAME);
pa_context_set_state_callback (self->context,
pulse_on_context_state_change, self);
pa_context_connect (self->context, NULL, PA_CONTEXT_NOAUTOSPAWN, NULL);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
pulse_on_finish (pa_context *context, int success, void *userdata)
{
(void) context;
(void) success;
(void) userdata;
// Just like... whatever, man
}
static bool
pulse_volume_mute (struct pulse *self)
{
if (!self->context || self->sink == PA_INVALID_INDEX)
return false;
pa_operation_unref (pa_context_set_sink_mute_by_index (self->context,
self->sink, !self->sink_muted, pulse_on_finish, self));
return true;
}
static bool
pulse_volume_set (struct pulse *self, int arg)
{
if (!self->context || self->sink == PA_INVALID_INDEX)
return false;
pa_cvolume volume = self->sink_volume;
if (arg > 0)
pa_cvolume_inc (&volume, (pa_volume_t) arg * PA_VOLUME_NORM / 100);
else
pa_cvolume_dec (&volume, (pa_volume_t) -arg * PA_VOLUME_NORM / 100);
pa_operation_unref (pa_context_set_sink_volume_by_index (self->context,
self->sink, &volume, pulse_on_finish, self));
return true;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
pulse_init (struct pulse *self, struct poller *poller)
{
memset (self, 0, sizeof *self);
self->sink = PA_INVALID_INDEX;
if (!poller)
return;
self->api = poller_pa_new (poller);
self->make_context = poller_timer_make (poller);
self->make_context.dispatcher = pulse_make_context;
self->make_context.user_data = self;
poller_timer_set (&self->make_context, 0);
}
static void
pulse_free (struct pulse *self)
{
if (self->context)
pa_context_unref (self->context);
if (self->api)
{
poller_pa_destroy (self->api);
poller_timer_reset (&self->make_context);
}
pulse_init (self, NULL);
}
#define VOLUME_PERCENT(x) (((x) * 100 + PA_VOLUME_NORM / 2) / PA_VOLUME_NORM)
static bool
pulse_volume_status (struct pulse *self, struct str *s)
{
if (!self->context || self->sink == PA_INVALID_INDEX
|| !self->sink_volume.channels)
return false;
if (self->sink_muted)
{
str_append (s, "Muted");
return true;
}
str_append_printf (s,
"%u%%", VOLUME_PERCENT (self->sink_volume.values[0]));
if (!pa_cvolume_channels_equal_to (&self->sink_volume,
self->sink_volume.values[0]))
{
for (size_t i = 1; i < self->sink_volume.channels; i++)
str_append_printf (s, " / %u%%",
VOLUME_PERCENT (self->sink_volume.values[i]));
}
return true;
}
#endif // WITH_PULSE
// --- 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 use a custom toolkit, so code would get bloated rather fast--
// especially given our TUI/GUI duality.
//
// 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.
// Widget identification, mostly for mouse events.
enum
{
WIDGET_NONE = 0, WIDGET_BUTTON, WIDGET_GAUGE, WIDGET_TAB, WIDGET_SPECTRUM,
WIDGET_LIST, WIDGET_SCROLLBAR, WIDGET_MESSAGE,
};
struct widget;
/// Draw a widget on the window
typedef void (*widget_render_fn) (struct widget *self);
/// Extract the contents of container widgets
typedef struct widget *(*widget_sublayout_fn) (struct widget *self);
/// A minimal abstraction appropriate for both TUI and GUI widgets.
/// Units for the widget's region are frontend-specific.
/// Having this as a linked list simplifies layouting and memory management.
struct widget
{
LIST_HEADER (struct widget)
int x; ///< X coordinate
int y; ///< Y coordinate
int width; ///< Width, initialized by UI methods
int height; ///< Height, initialized by UI methods
widget_render_fn on_render; ///< Render callback
widget_sublayout_fn on_sublayout; ///< Optional sublayout callback
chtype attrs; ///< Rendition, in Curses terms
short id; ///< Post-layouting identification
short subid; ///< Action ID/Tab index/...
char text[]; ///< Any text label
};
struct layout
{
struct widget *head;
struct widget *tail;
};
struct ui
{
struct widget *(*padding) (chtype attrs, float width, float height);
struct widget *(*label) (chtype attrs, const char *label);
struct widget *(*button) (chtype attrs, const char *label, enum action a);
struct widget *(*gauge) (chtype attrs);
struct widget *(*spectrum) (chtype attrs, int width);
struct widget *(*scrollbar) (chtype attrs);
struct widget *(*list) (void);
struct widget *(*editor) (chtype attrs);
void (*render) (void);
void (*flip) (void);
void (*winch) (void);
void (*destroy) (void);
bool have_icons;
};
/// Replaces negative widths amongst widgets in the sublist by redistributing
/// any width remaining after all positive claims are satisfied from "width".
/// Also unifies heights to the maximum value of the run, and returns it.
/// Then the widths are taken as final, and used to initialize X coordinates.
static int
widget_redistribute (struct widget *head, int width)
{
int parts = 0, max_height = 0;
LIST_FOR_EACH (struct widget, w, head)
{
max_height = MAX (max_height, w->height);
if (w->width < 0)
parts -= w->width;
else
width -= w->width;
}
int remaining = MAX (width, 0), part_width = parts ? remaining / parts : 0;
struct widget *last = NULL;
LIST_FOR_EACH (struct widget, w, head)
{
w->height = max_height;
if (w->width < 0)
{
remaining -= (w->width *= -part_width);
last = w;
}
}
if (last)
last->width += remaining;
int x = 0;
LIST_FOR_EACH (struct widget, w, head)
{
w->x = x;
x += w->width;
}
return max_height;
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
struct tab;
/// Try to handle an action in the tab
typedef bool (*tab_action_fn) (enum action action);
/// Return a line of widgets for the row
typedef struct layout (*tab_item_layout_fn) (size_t item_index);
struct tab
{
LIST_HEADER (struct tab)
char *name; ///< Visible identifier
char *header; ///< The header, should there be any
// Implementation:
tab_action_fn on_action; ///< User action handler callback
tab_item_layout_fn on_item_layout; ///< Item layout 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
struct poller_curl poller_curl; ///< cURL abstractor
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
char *message_detail; ///< Non-emphasized part
// 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; ///< Last tick ts or last elapsed time
bool elapsed_poll; ///< Poll MPD for the elapsed time?
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 strv enqueue; ///< Items to enqueue once connected
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
// User interface:
struct ui *ui; ///< User interface interface
struct layout widgets; ///< Layouted widgets
int ui_width; ///< Window width
int ui_height; ///< Window height
int ui_hunit; ///< Horizontal unit
int ui_vunit; ///< Vertical unit
bool ui_focused; ///< Whether the window has focus
short ui_dragging; ///< ID of any dragged widget
#ifdef WITH_FFTW
struct spectrum spectrum; ///< Spectrum analyser
int spectrum_fd; ///< FIFO file descriptor (non-blocking)
struct poller_fd spectrum_event; ///< FIFO watcher
#endif // WITH_FFTW
#ifdef WITH_PULSE
struct pulse pulse; ///< PulseAudio control
#endif // WITH_PULSE
bool pulse_control_requested; ///< PulseAudio control desired by user
#ifdef WITH_X11
XIM x11_im; ///< Input method
XIC x11_ic; ///< Input method context
Display *dpy; ///< X display handle
struct poller_fd x11_event; ///< X11 events on wire
struct poller_idle xpending_event; ///< X11 events possibly in I/O queues
int xkb_base_event_code; ///< Xkb base event code
Window x11_window; ///< Application window
Pixmap x11_pixmap; ///< Off-screen bitmap
Region x11_clip; ///< Invalidated region
Picture x11_pixmap_picture; ///< XRender wrap for x11_pixmap
XftDraw *xft_draw; ///< Xft rendering context
XftFont *xft_regular; ///< Regular font
XftFont *xft_bold; ///< Bold font
char *x11_selection; ///< CLIPBOARD selection
XRenderColor x_fg[ATTRIBUTE_COUNT]; ///< Foreground per attribute
XRenderColor x_bg[ATTRIBUTE_COUNT]; ///< Background per attribute
#endif // WITH_X11
struct line_editor editor; ///< Line editor
struct poller_idle refresh_event; ///< Refresh the window's contents
struct poller_idle flip_event; ///< Draw rendered widgets on screen
// Terminal:
termo_t *tk; ///< termo handle (TUI/X11)
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);
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 void
on_poll_elapsed_time_changed (struct config_item *item)
{
// This is only set once, on application startup
g.elapsed_poll = item->value.boolean;
}
static void
on_pulseaudio_changed (struct config_item *item)
{
// This is only set once, on application startup
g.pulse_control_requested = item->value.boolean;
}
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 },
// NOTE: this is unused--in theory we could allow manual metadata adjustment
// NOTE: the "config" command may return "music_directory" for local clients
{ .name = "root",
.comment = "Where all the files MPD is playing are located",
.type = CONFIG_ITEM_STRING },
#ifdef WITH_FFTW
{ .name = "spectrum_path",
.comment = "Visualizer feed path to a FIFO audio output",
.type = CONFIG_ITEM_STRING },
// MPD's "outputs" command doesn't include this information
{ .name = "spectrum_format",
.comment = "Visualizer feed data format",
.type = CONFIG_ITEM_STRING,
.default_ = "\"44100:16:2\"" },
// 10 is about the useful limit, then it gets too computationally expensive
{ .name = "spectrum_bars",
.comment = "Number of computed audio spectrum bars",
.type = CONFIG_ITEM_INTEGER,
.default_ = "8" },
{ .name = "spectrum_fps",
.comment = "Maximum frames per second, affects CPU usage",
.type = CONFIG_ITEM_INTEGER,
.default_ = "30" },
#endif // WITH_FFTW
#ifdef WITH_PULSE
{ .name = "pulseaudio",
.comment = "Look up MPD in PulseAudio for improved volume controls",
.type = CONFIG_ITEM_BOOLEAN,
.on_change = on_pulseaudio_changed,
.default_ = "off" },
#endif // WITH_PULSE
#ifdef WITH_X11
{ .name = "x11_font",
.comment = "Fontconfig name/pattern for the X11 font to use",
.type = CONFIG_ITEM_STRING,
.default_ = "`sans\\-serif-11`" },
#endif // WITH_X11
// Disabling this minimises MPD traffic and has the following caveats:
// - when MPD stalls on retrieving audio data, we keep ticking
// - when the "play" succeeds in ACTION_MPD_REPLACE for the same item as
// is currently playing, we do not reset g.song_elapsed (we could ask
// for a response which feels racy, or rethink the mechanism there)
{ .name = "poll_elapsed_time",
.comment = "Whether to actively poll MPD for the elapsed time",
.type = CONFIG_ITEM_BOOLEAN,
.on_change = on_poll_elapsed_time_changed,
.default_ = "on" },
{}
};
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);
hard_assert (poller_curl_init (&g.poller_curl, &g.poller, NULL));
g.client = mpd_client_make (&g.poller);
g.song_elapsed = g.song_duration = g.volume = g.song = -1;
g.playlist = item_list_make ();
g.config = config_make ();
g.streams = strv_make ();
g.enqueue = strv_make ();
g.playback_info = str_map_make (free);
g.playback_info.key_xfrm = tolower_ascii_strxfrm;
#ifdef WITH_FFTW
g.spectrum_fd = -1;
#endif // WITH_FFTW
#ifdef WITH_PULSE
pulse_init (&g.pulse, NULL);
#endif // WITH_PULSE
TERMO_CHECK_VERSION;
if (!(g.tk = termo_new (STDIN_FILENO, NULL, TERMO_FLAG_NOSTART)))
exit_fatal ("failed to initialize termo");
// 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;
// Presumably, although not necessarily; unsure if queryable at all
g.ui_focused = true;
app_init_attributes ();
}
static void
app_free_context (void)
{
mpd_client_free (&g.client);
str_map_free (&g.playback_info);
strv_free (&g.streams);
strv_free (&g.enqueue);
item_list_free (&g.playlist);
#ifdef WITH_FFTW
spectrum_free (&g.spectrum);
if (g.spectrum_fd != -1)
{
poller_fd_reset (&g.spectrum_event);
xclose (g.spectrum_fd);
}
#endif // WITH_FFTW
#ifdef WITH_PULSE
pulse_free (&g.pulse);
#endif // WITH_PULSE
line_editor_free (&g.editor);
config_free (&g.config);
poller_curl_free (&g.poller_curl);
poller_free (&g.poller);
free (g.message);
free (g.message_detail);
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;
}
// --- Layouting ---------------------------------------------------------------
static void
app_invalidate (void)
{
poller_idle_set (&g.refresh_event);
}
static void
app_flush_layout_to (struct layout *l, int width, struct layout *dest)
{
hard_assert (l != NULL && l->head != NULL);
widget_redistribute (l->head, width);
struct widget *last = dest->tail;
if (!last)
*dest = *l;
else
{
// Assuming there is no unclaimed vertical space.
LIST_FOR_EACH (struct widget, w, l->head)
w->y = last->y + last->height;
last->next = l->head;
l->head->prev = last;
dest->tail = l->tail;
}
}
static void
app_flush_layout (struct layout *l)
{
app_flush_layout_to (l, g.ui_width, &g.widgets);
}
static struct widget *
app_push (struct layout *l, struct widget *w)
{
LIST_APPEND_WITH_TAIL (l->head, l->tail, w);
return w;
}
static struct widget *
app_push_fill (struct layout *l, struct widget *w)
{
w->width = -1;
LIST_APPEND_WITH_TAIL (l->head, l->tail, w);
return w;
}
/// Write the given UTF-8 string padded with spaces.
/// @param[in] attrs Text attributes for the text, including padding.
static void
app_layout_text (const char *str, chtype attrs)
{
struct layout l = {};
app_push (&l, g.ui->padding (attrs, 0.25, 1));
app_push_fill (&l, g.ui->label (attrs, str));
app_push (&l, g.ui->padding (attrs, 0.25, 1));
app_flush_layout (&l);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
app_layout_song_info (void)
{
compact_map_t map;
if (!(map = item_list_get (&g.playlist, g.song)))
return;
chtype attrs[2] = { APP_ATTR (NORMAL), 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 layout l = {};
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_push (&l, g.ui->label (attrs[1], title));
app_push_fill (&l, g.ui->padding (attrs[0], 0, 1));
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_flush_layout (&l);
}
char *artist = compact_map_find (map, "artist");
char *album = compact_map_find (map, "album");
if (!artist && !album)
return;
struct layout l = {};
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
if (artist)
{
app_push (&l, g.ui->label (attrs[0], "by "));
app_push (&l, g.ui->label (attrs[1], artist));
}
if (album)
{
app_push (&l, g.ui->label (attrs[0], &" from "[!artist]));
app_push (&l, g.ui->label (attrs[1], album));
}
app_push_fill (&l, g.ui->padding (attrs[0], 0, 1));
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_flush_layout (&l);
}
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_layout_status (void)
{
bool stopped = g.state == PLAYER_STOPPED;
if (!stopped)
app_layout_song_info ();
chtype attrs[2] = { APP_ATTR (NORMAL), APP_ATTR (HIGHLIGHT) };
struct layout l = {};
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_push (&l, g.ui->button (attrs[!stopped], "<<", ACTION_MPD_PREVIOUS));
app_push (&l, g.ui->padding (attrs[0], 0.5, 1));
const char *toggle = g.state == PLAYER_PLAYING ? "||" : "|>";
app_push (&l, g.ui->button (attrs[1], toggle, ACTION_MPD_TOGGLE));
app_push (&l, g.ui->padding (attrs[0], 0.5, 1));
app_push (&l, g.ui->button (attrs[!stopped], "[]", ACTION_MPD_STOP));
app_push (&l, g.ui->padding (attrs[0], 0.5, 1));
app_push (&l, g.ui->button (attrs[!stopped], ">>", ACTION_MPD_NEXT));
app_push (&l, g.ui->padding (attrs[0], 1, 1));
if (stopped)
app_push_fill (&l, g.ui->label (attrs[0], "Stopped"));
else
{
if (g.song_elapsed >= 0)
{
char *s = app_time_string (g.song_elapsed);
app_push (&l, g.ui->label (attrs[0], s));
free (s);
}
if (g.song_duration >= 1)
{
char *s = app_time_string (g.song_duration);
app_push (&l, g.ui->label (attrs[0], " / "));
app_push (&l, g.ui->label (attrs[0], s));
free (s);
}
app_push (&l, g.ui->padding (attrs[0], 1, 1));
}
struct str volume = str_make ();
#ifdef WITH_PULSE
if (g.pulse_control_requested)
{
if (pulse_volume_status (&g.pulse, &volume))
{
if (g.volume >= 0 && g.volume != 100)
str_append_printf (&volume, " (%d%%)", g.volume);
}
else
{
if (g.volume >= 0)
str_append_printf (&volume, "(%d%%)", g.volume);
}
}
else
#endif // WITH_PULSE
if (g.volume >= 0)
str_append_printf (&volume, "%3d%%", g.volume);
if (!stopped && g.song_elapsed >= 0 && g.song_duration >= 1)
app_push (&l, g.ui->gauge (attrs[0]))
->id = WIDGET_GAUGE;
else
app_push_fill (&l, g.ui->padding (attrs[0], 0, 1));
if (volume.len)
{
app_push (&l, g.ui->padding (attrs[0], 1, 1));
app_push (&l, g.ui->label (attrs[0], volume.str));
}
str_free (&volume);
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_flush_layout (&l);
}
static void
app_layout_tabs (void)
{
chtype attrs[2] = { APP_ATTR (TAB_BAR), APP_ATTR (TAB_ACTIVE) };
struct layout l = {};
// The help tab is disguised so that it's not too intruding
app_push (&l, g.ui->padding (attrs[g.active_tab == g.help_tab], 0.25, 1))
->id = WIDGET_TAB;
app_push (&l, g.ui->label (attrs[g.active_tab == g.help_tab], APP_TITLE))
->id = WIDGET_TAB;
// XXX: attrs[0]?
app_push (&l, g.ui->padding (attrs[g.active_tab == g.help_tab], 0.5, 1))
->id = WIDGET_TAB;
int i = 0;
LIST_FOR_EACH (struct tab, iter, g.tabs)
{
struct widget *w = app_push (&l,
g.ui->label (attrs[iter == g.active_tab], iter->name));
w->id = WIDGET_TAB;
w->subid = ++i;
}
app_push_fill (&l, g.ui->padding (attrs[0], 1, 1));
#ifdef WITH_FFTW
// This seems like the most reasonable, otherwise unoccupied space
if (g.spectrum_fd != -1)
{
app_push (&l, g.ui->spectrum (attrs[0], g.spectrum.bars))
->id = WIDGET_SPECTRUM;
}
#endif // WITH_FFTW
app_flush_layout (&l);
}
static void
app_layout_header (void)
{
if (g.client.state == MPD_CONNECTED)
{
struct layout lt = {};
app_push_fill (&lt, g.ui->padding (APP_ATTR (NORMAL), 0, 0.125));
app_flush_layout (&lt);
app_layout_status ();
struct layout lb = {};
app_push_fill (&lb, g.ui->padding (APP_ATTR (NORMAL), 0, 0.125));
app_flush_layout (&lb);
}
app_layout_tabs ();
const char *header = g.active_tab->header;
if (header)
app_layout_text (header, APP_ATTR (HEADER));
}
static int
app_visible_items_height (void)
{
struct widget *list = NULL;
LIST_FOR_EACH (struct widget, w, g.widgets.head)
if (w->id == WIDGET_LIST)
list = w;
hard_assert (list != NULL);
// The raw number of items that would have fit on the terminal
return MAX (0, list->height);
}
static int
app_visible_items (void)
{
return app_visible_items_height () / g.ui_vunit;
}
/// 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 = s * tab->item_top, total = s * 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 = 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, visible - length };
return (struct scrollbar) { length, offset };
}
static struct layout
app_layout_row (struct tab *tab, int item_index)
{
int row_attrs = (item_index & 1) ? APP_ATTR (ODD) : APP_ATTR (EVEN);
bool override_colors = true;
if (item_index == tab->item_selected)
row_attrs = g.ui_focused
? APP_ATTR (SELECTION) : APP_ATTR (DEFOCUSED);
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 = g.ui_focused
? APP_ATTR (MULTISELECT) : APP_ATTR (DEFOCUSED);
else
override_colors = false;
// The padding must be added before the recoloring below.
struct layout l = tab->on_item_layout (item_index);
struct widget *w = g.ui->padding (0, 0.25, 1);
LIST_PREPEND (l.head, w);
app_push (&l, g.ui->padding (0, 0.25, 1));
// Combine attributes used by the handler with the defaults.
LIST_FOR_EACH (struct widget, w, l.head)
{
chtype *attrs = &w->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;
}
return l;
}
// XXX: This isn't a very clean design, in that part of layouting
// is done during the rendering stage.
static struct widget *
app_sublayout_list (struct widget *list)
{
struct tab *tab = g.active_tab;
int to_show = MIN ((int) tab->item_count - tab->item_top,
ceil ((double) list->height / g.ui_vunit));
struct layout l = {};
for (int row = 0; row < to_show; row++)
{
int item_index = tab->item_top + row;
struct layout subl = app_layout_row (tab, item_index);
app_flush_layout_to (&subl, list->width, &l);
}
LIST_FOR_EACH (struct widget, w, l.head)
{
w->x += list->x;
w->y += list->y;
}
return l.head;
}
static void
app_layout_view (void)
{
// XXX: Expecting the status bar to always be there, one row tall.
struct widget *last = g.widgets.tail;
int unavailable_height = last->y + last->height + g.ui_vunit;
struct layout l = {};
struct widget *w = app_push_fill (&l, g.ui->list ());
w->id = WIDGET_LIST;
w->height = g.ui_height - unavailable_height;
struct tab *tab = g.active_tab;
if ((int) tab->item_count * g.ui_vunit > w->height)
{
app_push (&l, g.ui->scrollbar (APP_ATTR (SCROLLBAR)))
->id = WIDGET_SCROLLBAR;
}
app_flush_layout (&l);
}
static void
app_layout_mpd_status_playlist (struct layout *l, chtype attrs)
{
char *songs = (g.playlist.len == 1)
? xstrdup_printf ("1 song")
: xstrdup_printf ("%zu songs", g.playlist.len);
app_push (l, g.ui->label (attrs, songs));
free (songs);
int hours = g.playlist_time / 3600;
int minutes = g.playlist_time % 3600 / 60;
if (hours || minutes)
{
struct str length = str_make ();
if (hours == 1)
str_append_printf (&length, " 1 hour");
else if (hours)
str_append_printf (&length, " %d hours", hours);
if (minutes == 1)
str_append_printf (&length, " 1 minute");
else if (minutes)
str_append_printf (&length, " %d minutes", minutes);
app_push (l, g.ui->padding (attrs, 1, 1));
app_push (l, g.ui->label (attrs, length.str + 1));
str_free (&length);
}
const char *task = NULL;
if (g.poller_curl.registered)
task = "Downloading...";
else if (str_map_find (&g.playback_info, "updating_db"))
task = "Updating database...";
if (task)
{
app_push (l, g.ui->padding (attrs, 1, 1));
app_push (l, g.ui->label (attrs, task));
}
}
static void
app_layout_mpd_status (void)
{
struct layout l = {};
chtype attrs[2] = { APP_ATTR (NORMAL), APP_ATTR (HIGHLIGHT) };
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
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);
app_push_fill (&l, g.ui->label (attrs[0], msg));
free (msg);
}
else
{
app_layout_mpd_status_playlist (&l, attrs[0]);
l.tail->width = -1;
}
const char *s = NULL;
struct str_map *map = &g.playback_info;
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");
if (g.ui->have_icons || repeat)
{
app_push (&l, g.ui->padding (attrs[0], 0.5, 1));
app_push (&l,
g.ui->button (attrs[repeat], "repeat", ACTION_MPD_REPEAT));
}
if (g.ui->have_icons || random)
{
app_push (&l, g.ui->padding (attrs[0], 0.5, 1));
app_push (&l,
g.ui->button (attrs[random], "random", ACTION_MPD_RANDOM));
}
if (g.ui->have_icons || single)
{
app_push (&l, g.ui->padding (attrs[0], 0.5, 1));
app_push (&l,
g.ui->button (attrs[single], "single", ACTION_MPD_SINGLE));
}
if (g.ui->have_icons || consume)
{
app_push (&l, g.ui->padding (attrs[0], 0.5, 1));
app_push (&l,
g.ui->button (attrs[consume], "consume", ACTION_MPD_CONSUME));
}
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_flush_layout (&l);
}
static void
app_layout_statusbar (void)
{
struct layout l = {};
chtype attrs[2] = { APP_ATTR (NORMAL), APP_ATTR (HIGHLIGHT) };
if (g.message)
{
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
if (!g.message_detail)
app_push_fill (&l, g.ui->label (attrs[1], g.message));
else
{
app_push (&l, g.ui->label (attrs[1], g.message));
app_push_fill (&l, g.ui->label (attrs[0], g.message_detail));
}
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_flush_layout (&l);
LIST_FOR_EACH (struct widget, w, l.head)
w->id = WIDGET_MESSAGE;
}
else if (g.editor.line)
{
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_push (&l, g.ui->editor (attrs[1]));
app_push (&l, g.ui->padding (attrs[0], 0.25, 1));
app_flush_layout (&l);
}
else if (g.client.state == MPD_CONNECTED)
app_layout_mpd_status ();
else if (g.client.state == MPD_CONNECTING)
app_layout_text ("Connecting to MPD...", attrs[0]);
else if (g.client.state == MPD_DISCONNECTED)
app_layout_text ("Disconnected", attrs[0]);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
/// 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_flip (void *user_data)
{
(void) user_data;
poller_idle_reset (&g.flip_event);
// Waste of time, and may cause X11 to render uninitialised pixmaps.
if (g.polling && !g.refresh_event.active)
g.ui->flip ();
}
static void
app_on_refresh (void *user_data)
{
(void) user_data;
poller_idle_reset (&g.refresh_event);
LIST_FOR_EACH (struct widget, w, g.widgets.head)
free (w);
g.widgets = (struct layout) {};
app_layout_header ();
app_layout_view ();
app_layout_statusbar ();
app_fix_view_range();
g.ui->render ();
poller_idle_set (&g.flip_event);
}
// --- 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_center_cursor (void)
{
struct tab *tab = g.active_tab;
if (tab->item_selected < 0 || !tab->item_count)
return false;
int offset = tab->item_selected - tab->item_top;
int target = app_visible_items () / 2;
app_scroll (offset - target);
return true;
}
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_show_message (char *message, char *detail)
{
cstr_set (&g.message, message);
cstr_set (&g.message_detail, detail);
poller_timer_set (&g.message_timer, 5000);
app_invalidate ();
}
static void
app_hide_message (void)
{
if (!g.message)
return;
cstr_set (&g.message, NULL);
cstr_set (&g.message_detail, NULL);
poller_timer_reset (&g.message_timer);
app_invalidate ();
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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 -----------------------------------------------------------------
static int
action_resolve (const char *name)
{
for (int i = 0; i < ACTION_COUNT; i++)
if (!strcasecmp_ascii (g_action_names[i], name))
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_mpd_command_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 size_t
incremental_search_match (const ucs4_t *needle, size_t len,
const ucs4_t *chars, size_t chars_len)
{
// XXX: this is slow and simplistic, but unistring is awkward to use
size_t best = 0;
for (size_t start = 0; start < chars_len; start++)
{
size_t i = 0;
for (; i < len && start + i < chars_len; i++)
if (uc_tolower (needle[i]) != uc_tolower (chars[start + i]))
break;
best = MAX (best, i);
}
return best;
}
static void
incremental_search_on_changed (void)
{
struct tab *tab = g.active_tab;
if (!tab->item_count)
return;
size_t best = 0, current = 0, index = MAX (tab->item_selected, 0), i = 0;
while (i++ < tab->item_count)
{
struct str s = str_make ();
LIST_FOR_EACH (struct widget, w, tab->on_item_layout (index).head)
{
str_append (&s, w->text);
free (w);
}
size_t len;
ucs4_t *text = u8_to_u32 ((const uint8_t *) s.str, s.len, NULL, &len);
str_free (&s);
current = incremental_search_match
(g.editor.line, g.editor.len, text, len);
free (text);
if (best < current)
{
best = current;
tab->item_selected = index;
app_move_selection (0);
}
index = (index + 1) % tab->item_count;
}
}
static void
incremental_search_on_end (bool confirmed)
{
(void) confirmed;
// Required callback, nothing to do here.
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
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_mpd_command_editor_end;
app_invalidate ();
app_hide_message ();
return true;
default:
print_error ("\"%s\" is not allowed here",
g_action_descriptions[action]);
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_INCREMENTAL_SEARCH:
line_editor_start (&g.editor, '/');
g.editor.on_changed = incremental_search_on_changed;
g.editor.on_end = incremental_search_on_end;
app_invalidate ();
app_hide_message ();
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);
#ifdef WITH_PULSE
case ACTION_PULSE_VOLUME_UP: return pulse_volume_set (&g.pulse, +10);
case ACTION_PULSE_VOLUME_DOWN: return pulse_volume_set (&g.pulse, -10);
case ACTION_PULSE_MUTE: return pulse_volume_mute (&g.pulse);
#endif // WITH_PULSE
// XXX: these two should rather be parametrized
case ACTION_SCROLL_UP: return app_scroll (-3);
case ACTION_SCROLL_DOWN: return app_scroll (+3);
case ACTION_CENTER_CURSOR: return app_center_cursor ();
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:
print_error ("\"%s\" is not allowed here",
g_action_descriptions[action]);
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);
}
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// Carefully chosen to limit the possibility of ever hitting termo keymods.
enum { APP_KEYMOD_DOUBLE_CLICK = 1 << 15 };
static bool
app_process_left_mouse_click (struct widget *w, int x, int y, int modifiers)
{
switch (w->id)
{
case WIDGET_BUTTON:
app_process_action (w->subid);
break;
case WIDGET_GAUGE:
{
// TODO: We should avoid queuing up too many.
float position = (float) x / w->width;
if (g.song_duration >= 1)
{
char *where = xstrdup_printf ("%f", position * g.song_duration);
MPD_SIMPLE ("seekcur", where);
free (where);
}
break;
}
case WIDGET_TAB:
{
struct tab *tab = g.help_tab;
int i = 0;
LIST_FOR_EACH (struct tab, iter, g.tabs)
if (++i == w->subid)
tab = iter;
app_switch_tab (tab);
break;
}
case WIDGET_LIST:
{
struct tab *tab = g.active_tab;
int row_index = y / g.ui_vunit;
if (row_index < 0
|| row_index >= (int) tab->item_count - tab->item_top)
return false;
if (!(modifiers & TERMO_KEYMOD_SHIFT))
tab->item_mark = -1;
else if (!tab->can_multiselect || tab->item_selected < 0)
return false;
else if (tab->item_mark < 0)
tab->item_mark = tab->item_selected;
tab->item_selected = row_index + tab->item_top;
app_ensure_selection_visible ();
app_invalidate ();
if (modifiers & APP_KEYMOD_DOUBLE_CLICK)
app_process_action (ACTION_CHOOSE);
break;
}
case WIDGET_SCROLLBAR:
{
struct tab *tab = g.active_tab;
int visible_items = app_visible_items ();
tab->item_top = (double) y / w->height
* (int) tab->item_count - visible_items / 2;
app_invalidate ();
break;
}
case WIDGET_MESSAGE:
app_hide_message ();
}
return true;
}
static bool
app_process_mouse (termo_mouse_event_t type, int x, int y, int button,
int modifiers)
{
// XXX: Terminals don't let us know which button has been released,
// so we can't press buttons at that point. We'd need a special "click"
// event handler that could be handled better under X11.
if (type == TERMO_MOUSE_RELEASE)
{
g.ui_dragging = WIDGET_NONE;
return true;
}
if (type == TERMO_MOUSE_DRAG)
{
if (g.ui_dragging != WIDGET_GAUGE
&& g.ui_dragging != WIDGET_SCROLLBAR)
return true;
struct widget *target = NULL;
LIST_FOR_EACH (struct widget, w, g.widgets.head)
if (w->id == g.ui_dragging)
target = w;
x -= target->x;
y -= target->y;
return app_process_left_mouse_click (target, x, y, modifiers);
}
if (g.editor.line)
{
line_editor_abort (&g.editor, false);
app_invalidate ();
}
struct widget *target = NULL;
LIST_FOR_EACH (struct widget, w, g.widgets.head)
if (x >= w->x && x < w->x + w->width
&& y >= w->y && y < w->y + w->height)
target = w;
if (!target)
return false;
x -= target->x;
y -= target->y;
switch (button)
{
case 1:
g.ui_dragging = target->id;
return app_process_left_mouse_click (target, x, y, modifiers);
case 4:
if (target->id == WIDGET_LIST)
return app_process_action (ACTION_SCROLL_UP);
break;
case 5:
if (target->id == WIDGET_LIST)
return app_process_action (ACTION_SCROLL_DOWN);
break;
}
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 },
{ "S-Tab", ACTION_TAB_PREVIOUS },
{ "Tab", ACTION_TAB_NEXT },
{ "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 },
{ "z", ACTION_CENTER_CURSOR },
{ "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 },
{ "?", ACTION_DESCRIBE },
{ "M-Up", ACTION_UP },
{ "Backspace", ACTION_UP },
{ "v", ACTION_MULTISELECT },
{ "C-s", ACTION_INCREMENTAL_SEARCH },
{ "/", 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 char *
app_strfkey (const termo_key_t *key)
{
// For display purposes, this is highly desirable
int flags = termo_get_flags (g.tk);
termo_set_flags (g.tk, flags | TERMO_FLAG_SPACESYMBOL);
termo_key_t fixed = *key;
termo_canonicalise (g.tk, &fixed);
termo_set_flags (g.tk, flags);
char buf[16] = "";
termo_strfkey_utf8 (g.tk, buf, sizeof buf, &fixed, TERMO_FORMAT_ALTISMETA);
return xstrdup (buf);
}
static bool
app_process_termo_event (termo_key_t *event)
{
char *formatted = app_strfkey (event);
print_debug ("%s", formatted);
free (formatted);
bool handled = false;
if ((handled = event->type == TERMO_TYPE_FOCUS))
{
g.ui_focused = !!event->code.focused;
app_invalidate ();
// Senseless fall-through
}
struct binding dummy = { *event, 0, 0 }, *binding;
if (g.editor.line)
{
if (event->type == TERMO_TYPE_KEY
|| event->type == TERMO_TYPE_FUNCTION
|| event->type == TERMO_TYPE_KEYSYM)
app_hide_message ();
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 handled;
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 handled;
}
// --- Current tab -------------------------------------------------------------
static struct tab g_current_tab;
static struct layout
current_tab_on_item_layout (size_t item_index)
{
// TODO: configurable output, maybe dynamically sized columns
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;
struct layout l = {};
if (artist && title)
{
char *joined = xstrdup_printf ("%s - %s", artist, title);
app_push_fill (&l, g.ui->label (attrs, joined));
free (joined);
}
else
app_push_fill (&l, g.ui->label (attrs, compact_map_find (map, "file")));
int duration = -1;
mpd_read_time (compact_map_find (map, "duration"), &duration, NULL);
mpd_read_time (compact_map_find (map, "time"), &duration, NULL);
char *s = duration < 0 ? xstrdup ("-") : app_time_string (duration);
app_push (&l, g.ui->padding (attrs, 1, 1));
app_push (&l, g.ui->label (attrs, s));
free (s);
return l;
}
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_DESCRIBE:
if (!map || !(id = compact_map_find (map, "file")))
return false;
app_show_message (xstrdup ("Path: "), xstrdup (id));
return true;
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_layout = current_tab_on_item_layout;
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
};
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
LIBRARY_PLAYLIST = 'p', ///< Playlist (unsupported)
};
struct library_tab_item
{
int type; ///< Type of the item
int duration; ///< Duration or -1 if N/A or unknown
char *name; ///< Visible name
const char *path; ///< MPD path (follows the name)
};
static struct
{
struct tab super; ///< Parent class
struct str path; ///< Current path
struct library_level *above; ///< Upper levels
/// Current items
ARRAY (struct library_tab_item, items)
bool searching; ///< Search mode is active
}
g_library_tab;
static void
library_tab_add (int type, int duration, const char *name, const char *path)
{
// Slightly reduce memory overhead while retaining friendly access
size_t name_len = strlen (name), path_len = strlen (path);
char *combined = xmalloc (++name_len + ++path_len);
ARRAY_RESERVE (g_library_tab.items, 1);
g_library_tab.items[g_library_tab.items_len++] = (struct library_tab_item)
{
.type = type,
.duration = duration,
.name = memcpy (combined, name, name_len),
.path = memcpy (combined + name_len, path, path_len),
};
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static struct layout
library_tab_on_item_layout (size_t item_index)
{
hard_assert (item_index < g_library_tab.items_len);
struct library_tab_item *x = &g_library_tab.items[item_index];
const char *prefix, *name;
switch (x->type)
{
case LIBRARY_ROOT: prefix = "/"; name = ""; break;
case LIBRARY_UP: prefix = "/"; name = ".."; break;
case LIBRARY_DIR: prefix = "/"; name = x->name; break;
case LIBRARY_FILE: prefix = " "; name = x->name; break;
default: hard_assert (!"invalid item type");
}
chtype attrs = x->type != LIBRARY_FILE ? APP_ATTR (DIRECTORY) : 0;
struct layout l = {};
app_push (&l, g.ui->label (attrs, prefix));
app_push_fill (&l, g.ui->label (attrs, name));
if (x->duration >= 0)
{
char *s = app_time_string (x->duration);
app_push (&l, g.ui->padding (0, 1, 1));
app_push (&l, g.ui->label (attrs, s));
free (s);
}
return l;
}
static char
library_tab_header_type (const char *key)
{
if (!strcasecmp_ascii (key, "file")) return LIBRARY_FILE;
if (!strcasecmp_ascii (key, "directory")) return LIBRARY_DIR;
if (!strcasecmp_ascii (key, "playlist")) return LIBRARY_PLAYLIST;
return 0;
}
static void
library_tab_chunk (char type, const char *path, struct str_map *map)
{
// CUE files appear once as a directory and another time as a playlist,
// just skip them entirely
if (type == LIBRARY_PLAYLIST)
return;
const char *artist = str_map_find (map, "artist");
const char *title = str_map_find (map, "title");
char *name = (artist && title)
? xstrdup_printf ("%s - %s", artist, title)
: xstrdup (xbasename (path));
int duration = -1;
mpd_read_time (str_map_find (map, "duration"), &duration, NULL);
mpd_read_time (str_map_find (map, "time"), &duration, NULL);
library_tab_add (type, duration, name, path);
free (name);
}
static int
library_tab_compare (struct library_tab_item *a, struct library_tab_item *b)
{
if (a->type != b->type)
return a->type - b->type;
return app_casecmp ((uint8_t *) a->path, (uint8_t *) b->path);
}
static char *
library_tab_parent (void)
{
struct str *path = &g_library_tab.path;
if (!path->len)
return NULL;
char *last_slash;
if ((last_slash = strrchr (path->str, '/')))
return xstrndup (path->str, last_slash - path->str);
return xstrdup ("");
}
static bool
library_tab_is_above (const char *above, const char *subdir)
{
size_t above_len = strlen (above);
if (strncmp (above, subdir, above_len))
return false;
// The root is an empty string and is above anything other than itself
return subdir[above_len] == '/' || (*subdir && !*above);
}
static void
library_tab_change_level (const char *new_path)
{
struct str *path = &g_library_tab.path;
if (!strcmp (path->str, new_path))
return;
struct library_level *above;
if (library_tab_is_above (path->str, new_path))
{
above = xcalloc (1, sizeof *above + path->len + 1);
above->item_top = g_library_tab.super.item_top;
above->item_selected = g_library_tab.super.item_selected;
memcpy (above->path, path->str, path->len);
LIST_PREPEND (g_library_tab.above, above);
// Select the ".." entry to reflect Norton Commander
g_library_tab.super.item_top = 0;
g_library_tab.super.item_selected = 1;
}
else while ((above = g_library_tab.above)
&& !library_tab_is_above (above->path, new_path))
{
if (!strcmp (above->path, new_path))
{
g_library_tab.super.item_top = above->item_top;
g_library_tab.super.item_selected = above->item_selected;
}
g_library_tab.above = above->next;
free (above);
}
str_reset (path);
str_append (path, new_path);
cstr_set (&g_library_tab.super.header, NULL);
g_library_tab.super.item_mark = -1;
if (path->len)
g_library_tab.super.header = xstrdup_printf ("/%s", path->str);
}
static void
library_tab_reset (void)
{
for (size_t i = 0; i < g_library_tab.items_len; i++)
free (g_library_tab.items[i].name);
free (g_library_tab.items);
ARRAY_INIT (g_library_tab.items);
}
static void
library_tab_load_data (const struct strv *data)
{
library_tab_reset ();
char *parent = library_tab_parent ();
if (parent)
{
library_tab_add (LIBRARY_ROOT, -1, "", "");
library_tab_add (LIBRARY_UP, -1, "", parent);
free (parent);
}
struct str_map map = str_map_make (NULL);
map.key_xfrm = tolower_ascii_strxfrm;
char *key, *value, type;
for (size_t i = data->len; i--; )
if (!(key = mpd_parse_kv (data->vector[i], &value)))
continue;
else if (!(type = library_tab_header_type (key)))
str_map_set (&map, key, value);
else
{
library_tab_chunk (type, value, &map);
str_map_clear (&map);
}
str_map_free (&map);
struct library_tab_item *items = g_library_tab.items;
size_t len = g_library_tab.super.item_count = g_library_tab.items_len;
qsort (items, len, sizeof *items,
(int (*) (const void *, const void *)) library_tab_compare);
// XXX: this unmarks even if just the database updates
g_library_tab.super.item_mark = -1;
// Don't force the selection visible when there's no need to touch it
if (g_library_tab.super.item_selected >= (int) len)
app_move_selection (0);
app_invalidate ();
}
static void
library_tab_on_data (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
char *new_path = user_data;
if (!response->success)
{
print_error ("cannot read directory: %s", response->message_text);
free (new_path);
return;
}
g_library_tab.searching = false;
library_tab_change_level (new_path);
free (new_path);
library_tab_load_data (data);
}
static void
library_tab_reload (const char *new_path)
{
if (!new_path && g_library_tab.searching)
return; // TODO: perhaps we should call search_on_changed()
char *path = new_path
? xstrdup (new_path)
: xstrdup (g_library_tab.path.str);
struct mpd_client *c = &g.client;
mpd_client_send_command (c, "lsinfo", *path ? path : "/", NULL);
mpd_client_add_task (c, library_tab_on_data, path);
mpd_client_idle (c, 0);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
library_tab_on_search_data (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
(void) user_data;
if (!g_library_tab.searching)
return;
if (!response->success)
{
print_error ("cannot search: %s", response->message_text);
return;
}
library_tab_load_data (data);
}
static void
search_on_changed (void)
{
struct mpd_client *c = &g.client;
size_t len;
char *u8 = (char *) u32_to_u8 (g.editor.line, g.editor.len + 1, NULL, &len);
mpd_client_send_command (c, "search", "any", u8, NULL);
free (u8);
mpd_client_add_task (c, library_tab_on_search_data, NULL);
mpd_client_idle (c, 0);
}
static void
search_on_end (bool confirmed)
{
if (!confirmed)
library_tab_reload (g_library_tab.above->path);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static bool
library_tab_is_range_playable (struct tab_range range)
{
for (int i = range.from; i <= range.upto; i++)
{
struct library_tab_item *x = &g_library_tab.items[i];
if (x->type == LIBRARY_DIR || x->type == LIBRARY_FILE)
return true;
}
return false;
}
static bool
library_tab_on_action (enum action action)
{
struct mpd_client *c = &g.client;
if (c->state != MPD_CONNECTED)
return false;
struct tab *tab = &g_library_tab.super;
struct tab_range range = tab_selection_range (tab);
if (range.from < 0)
return false;
struct library_tab_item *x = &g_library_tab.items[range.from];
switch (action)
{
case ACTION_CHOOSE:
// I can't think of a reasonable way of handling that
if (range.from != range.upto)
break;
switch (x->type)
{
case LIBRARY_ROOT:
case LIBRARY_UP:
case LIBRARY_DIR: library_tab_reload (x->path); break;
case LIBRARY_FILE: MPD_SIMPLE ("add", x->path); break;
default: hard_assert (!"invalid item type");
}
tab->item_mark = -1;
return true;
case ACTION_DESCRIBE:
if (!*x->path)
break;
app_show_message (xstrdup ("Path: "), xstrdup (x->path));
return true;
case ACTION_UP:
{
char *parent = library_tab_parent ();
if (parent)
{
library_tab_reload (parent);
free (parent);
}
return parent != NULL;
}
case ACTION_MPD_SEARCH:
{
line_editor_start (&g.editor, '/');
g.editor.on_changed = search_on_changed;
g.editor.on_end = search_on_end;
// We just need to be deeper but not match anything real,
// in order to keep the rest of the codebase functional as-is
if (!g_library_tab.searching)
{
char *fake_subdir = xstrdup_printf ("%s/", g_library_tab.path.str);
library_tab_change_level (fake_subdir);
free (fake_subdir);
}
cstr_set (&tab->header, xstrdup_printf ("Global search"));
g_library_tab.searching = true;
// Since we've already changed the header, empty the list,
// although to be consistent we should also ask to search for "",
// which dumps the database
struct strv empty = strv_make ();
library_tab_load_data (&empty);
strv_free (&empty);
app_invalidate ();
return true;
}
case ACTION_MPD_ADD:
if (!library_tab_is_range_playable (range))
break;
for (int i = range.from; i <= range.upto; i++)
{
struct library_tab_item *x = &g_library_tab.items[i];
if (x->type == LIBRARY_DIR || x->type == LIBRARY_FILE)
MPD_SIMPLE ("add", x->path);
}
tab->item_mark = -1;
return true;
case ACTION_MPD_REPLACE:
if (!library_tab_is_range_playable (range))
break;
// Clears the playlist (which stops playback), add what user wanted
// to replace it with, and eventually restore playback;
// I can't think of a reliable alternative that omits the "play"
mpd_client_list_begin (c);
mpd_client_send_command (c, "clear", NULL);
for (int i = range.from; i <= range.upto; i++)
{
struct library_tab_item *x = &g_library_tab.items[i];
if (x->type == LIBRARY_DIR || x->type == LIBRARY_FILE)
mpd_client_send_command (c, "add", x->path, NULL);
}
if (g.state == PLAYER_PLAYING)
mpd_client_send_command (c, "play", NULL);
mpd_client_list_end (c);
mpd_client_add_task (c, mpd_on_simple_response, NULL);
mpd_client_idle (c, 0);
tab->item_mark = -1;
return true;
default:
break;
}
return false;
}
static struct tab *
library_tab_init (void)
{
g_library_tab.path = str_make ();
// g_library_tab.items is fine with zero initialisation
struct tab *super = &g_library_tab.super;
tab_init (super, "Library");
super->can_multiselect = true;
super->on_action = library_tab_on_action;
super->on_item_layout = library_tab_on_item_layout;
return super;
}
// --- Streams -----------------------------------------------------------------
// MPD can only parse m3u8 playlists, and only when it feels like doing so
struct stream_tab_task
{
struct poller_curl_task curl; ///< Superclass
struct str data; ///< Downloaded data
bool replace; ///< Should playlist be replaced?
struct curl_slist *alias_ok;
};
static bool
is_content_type (const char *content_type,
const char *expected_type, const char *expected_subtype)
{
char *type = NULL, *subtype = NULL;
bool result = http_parse_media_type (content_type, &type, &subtype, NULL)
&& !strcasecmp_ascii (type, expected_type)
&& !strcasecmp_ascii (subtype, expected_subtype);
free (type);
free (subtype);
return result;
}
static void
streams_tab_filter (char *line, regex_t *re, struct strv *out)
{
regmatch_t groups[2];
if (regexec (re, line, 2, groups, 0) == REG_NOMATCH)
return;
// It may happen that playlist files contain useless, invalid quotes,
// let's be liberal in what we accept
regoff_t start = groups[1].rm_so, end = groups[1].rm_eo;
while (end > start + 1 && line[start] == '"' && line[end - 1] == '"')
{
start++;
end--;
}
char *target = xstrndup (line + start, end - start);
if (utf8_validate (target, end - start))
strv_append_owned (out, target);
else
{
strv_append_owned (out, latin1_to_utf8 (target));
free (target);
}
}
static void
streams_tab_parse_playlist (const char *playlist, const char *content_type,
struct strv *out)
{
// We accept a lot of very broken stuff because this is the real world
struct strv lines = strv_make ();
cstr_split (playlist, "\r\n", true, &lines);
// Since this excludes '"', it should even work for XMLs (w/o entities)
const char *extract_re =
"(https?://([][a-z0-9._~:/?#@!$&'()*+,;=-]|%[a-f0-9]{2})+)";
if ((lines.len && !strcasecmp_ascii (lines.vector[0], "[playlist]"))
|| (content_type && is_content_type (content_type, "audio", "x-scpls")))
extract_re = "^File[^=]*=(.+)";
else if ((lines.len && !strcasecmp_ascii (lines.vector[0], "#EXTM3U"))
|| (content_type && is_content_type (content_type, "audio", "x-mpegurl")))
extract_re = "^([^#].*)";
regex_t *re = regex_compile (extract_re, REG_EXTENDED, NULL);
hard_assert (re != NULL);
for (size_t i = 0; i < lines.len; i++)
streams_tab_filter (lines.vector[i], re, out);
regex_free (re);
strv_free (&lines);
}
static bool
streams_tab_extract_links (struct str *data, const char *content_type,
struct strv *out)
{
// Since playlists are also "audio/*", this seems like a sane thing to do
for (size_t i = 0; i < data->len; i++)
{
uint8_t c = data->str[i];
if (iscntrl_ascii (c) & (c != '\t') & (c != '\r') & (c != '\n'))
return false;
}
streams_tab_parse_playlist (data->str, content_type, out);
return true;
}
static void
streams_tab_task_finalize (struct stream_tab_task *self)
{
curl_easy_cleanup (self->curl.easy);
curl_slist_free_all (self->alias_ok);
str_free (&self->data);
free (self);
}
static void
streams_tab_task_dispose (struct stream_tab_task *self)
{
hard_assert (poller_curl_remove (&g.poller_curl, self->curl.easy, NULL));
streams_tab_task_finalize (self);
}
static void
streams_tab_on_downloaded (CURLMsg *msg, struct poller_curl_task *task)
{
struct stream_tab_task *self =
CONTAINER_OF (task, struct stream_tab_task, curl);
if (msg->data.result
&& msg->data.result != CURLE_WRITE_ERROR)
{
cstr_uncapitalize (self->curl.curl_error);
print_error ("%s", self->curl.curl_error);
goto dispose;
}
struct mpd_client *c = &g.client;
if (c->state != MPD_CONNECTED)
goto dispose;
CURL *easy = msg->easy_handle;
CURLcode res;
long code;
char *type, *uri;
if ((res = curl_easy_getinfo (easy, CURLINFO_RESPONSE_CODE, &code))
|| (res = curl_easy_getinfo (easy, CURLINFO_CONTENT_TYPE, &type))
|| (res = curl_easy_getinfo (easy, CURLINFO_EFFECTIVE_URL, &uri)))
{
print_error ("%s: %s",
"cURL info retrieval failed", curl_easy_strerror (res));
goto dispose;
}
// cURL is not willing to parse the ICY header, the code is zero then
if (code && code != 200)
{
print_error ("%s: %ld", "unexpected HTTP response", code);
goto dispose;
}
mpd_client_list_begin (c);
if (self->replace)
mpd_client_send_command (c, "clear", NULL);
struct strv links = strv_make ();
if (!streams_tab_extract_links (&self->data, type, &links))
strv_append (&links, uri);
for (size_t i = 0; i < links.len; i++)
mpd_client_send_command (c, "add", links.vector[i], NULL);
if (self->replace && g.state == PLAYER_PLAYING)
mpd_client_send_command (c, "play", NULL);
strv_free (&links);
mpd_client_list_end (c);
mpd_client_add_task (c, mpd_on_simple_response, NULL);
mpd_client_idle (c, 0);
dispose:
streams_tab_task_dispose (self);
}
static size_t
write_callback (char *ptr, size_t size, size_t nmemb, void *user_data)
{
struct str *buf = user_data;
str_append_data (buf, ptr, size * nmemb);
// Invoke CURLE_WRITE_ERROR when we've received enough data for a playlist
if (buf->len >= (1 << 16))
return 0;
return size * nmemb;
}
static bool
streams_tab_process (const char *uri, bool replace, struct error **e)
{
// TODO: streams_tab_task_dispose() on that running task
if (g.poller_curl.registered)
{
print_error ("waiting for the last stream to time out");
return false;
}
struct stream_tab_task *task = xcalloc (1, sizeof *task);
hard_assert (poller_curl_spawn (&task->curl, NULL));
CURL *easy = task->curl.easy;
task->data = str_make ();
task->replace = replace;
task->alias_ok = curl_slist_append (NULL, "ICY 200 OK");
CURLcode res;
if ((res = curl_easy_setopt (easy, CURLOPT_FOLLOWLOCATION, 1L))
|| (res = curl_easy_setopt (easy, CURLOPT_NOPROGRESS, 1L))
|| (res = curl_easy_setopt (easy, CURLOPT_TIMEOUT, 10L))
// Not checking anything, we just want some data, any data
|| (res = curl_easy_setopt (easy, CURLOPT_SSL_VERIFYPEER, 0L))
|| (res = curl_easy_setopt (easy, CURLOPT_SSL_VERIFYHOST, 0L))
|| (res = curl_easy_setopt (easy, CURLOPT_URL, uri))
|| (res = curl_easy_setopt (easy, CURLOPT_HTTP200ALIASES, task->alias_ok))
|| (res = curl_easy_setopt (easy, CURLOPT_VERBOSE, (long) g_debug_mode))
|| (res = curl_easy_setopt (easy, CURLOPT_DEBUGFUNCTION, print_curl_debug))
|| (res = curl_easy_setopt (easy, CURLOPT_WRITEDATA, &task->data))
|| (res = curl_easy_setopt (easy, CURLOPT_WRITEFUNCTION, write_callback)))
{
error_set (e, "%s: %s", "cURL setup failed", curl_easy_strerror (res));
streams_tab_task_finalize (task);
return false;
}
task->curl.on_done = streams_tab_on_downloaded;
hard_assert (poller_curl_add (&g.poller_curl, task->curl.easy, NULL));
return true;
}
static bool
streams_tab_on_action (enum action action)
{
struct tab *tab = g.active_tab;
if (tab->item_selected < 0 || !tab->item_count)
return false;
// For simplicity the URL is the string following the stream name
const char *uri = 1 + strchr (g.streams.vector[tab->item_selected], 0);
struct error *e = NULL;
switch (action)
{
case ACTION_MPD_REPLACE:
streams_tab_process (uri, true, &e);
break;
case ACTION_CHOOSE:
case ACTION_MPD_ADD:
streams_tab_process (uri, false, &e);
break;
case ACTION_DESCRIBE:
app_show_message (xstrdup (uri), NULL);
break;
default:
return false;
}
if (e)
{
print_error ("%s", e->message);
error_free (e);
}
return true;
}
static struct layout
streams_tab_on_item_layout (size_t item_index)
{
struct layout l = {};
app_push_fill (&l, g.ui->label (0, g.streams.vector[item_index]));
return l;
}
static struct tab *
streams_tab_init (void)
{
static struct tab super;
tab_init (&super, "Streams");
super.on_action = streams_tab_on_action;
super.on_item_layout = streams_tab_on_item_layout;
super.item_count = g.streams.len;
return &super;
}
// --- Info tab ----------------------------------------------------------------
static struct
{
struct tab super; ///< Parent class
struct strv keys; ///< Data keys
struct strv values; ///< Data values
}
g_info_tab;
static struct layout
info_tab_on_item_layout (size_t item_index)
{
const char *key = g_info_tab.keys.vector[item_index];
const char *value = g_info_tab.values.vector[item_index];
struct layout l = {};
char *prefix = xstrdup_printf ("%s:", key);
app_push (&l, g.ui->label (A_BOLD, prefix))
->width = 8 * g.ui_hunit;
app_push (&l, g.ui->padding (0, 0.5, 1));
app_push_fill (&l, g.ui->label (0, value));
return l;
}
static void
info_tab_add (compact_map_t data, const char *field)
{
const char *value = compact_map_find (data, field);
if (!value) value = "";
strv_append (&g_info_tab.keys, field);
strv_append (&g_info_tab.values, value);
g_info_tab.super.item_count++;
}
static void
info_tab_update (void)
{
strv_reset (&g_info_tab.keys);
strv_reset (&g_info_tab.values);
g_info_tab.super.item_count = 0;
compact_map_t map;
if ((map = item_list_get (&g.playlist, g.song)))
{
info_tab_add (map, "Title");
info_tab_add (map, "Artist");
info_tab_add (map, "Album");
info_tab_add (map, "Track");
info_tab_add (map, "Genre");
// Yes, it is "file", but this is also for display
info_tab_add (map, "File");
}
}
static struct tab *
info_tab_init (void)
{
g_info_tab.keys = strv_make ();
g_info_tab.values = strv_make ();
struct tab *super = &g_info_tab.super;
tab_init (super, "Info");
super->on_item_layout = info_tab_on_item_layout;
return super;
}
// --- Help tab ----------------------------------------------------------------
static struct
{
struct tab super; ///< Parent class
ARRAY (enum action, actions) ///< Actions for content
struct strv lines; ///< Visible content
}
g_help_tab;
static bool
help_tab_on_action (enum action action)
{
struct tab *tab = &g_help_tab.super;
if (tab->item_selected < 0
|| tab->item_selected >= (int) g_help_tab.actions_len)
return false;
enum action a = g_help_tab.actions[tab->item_selected];
if (!a)
return false;
if (action == ACTION_DESCRIBE)
{
char *name = xstrdup (g_action_names[a]);
cstr_transform (name, tolower_ascii);
app_show_message (xstrdup ("Configuration name: "), name);
return true;
}
if (action != ACTION_CHOOSE || a == ACTION_CHOOSE /* avoid recursion */)
return false;
// XXX: We can't propagate failure to ring the terminal/X11 bell, but we
// don't want to let our caller show a bad "can't do that" message either.
return app_process_action (a), true;
}
static void
help_tab_assign_action (enum action action)
{
hard_assert (g_help_tab.lines.len > g_help_tab.actions_len);
size_t to_push = g_help_tab.lines.len - g_help_tab.actions_len;
ARRAY_RESERVE (g_help_tab.actions, to_push);
for (size_t i = 1; i < to_push; i++)
g_help_tab.actions[g_help_tab.actions_len++] = ACTION_NONE;
g_help_tab.actions[g_help_tab.actions_len++] = action;
}
static void
help_tab_group (struct binding *keys, size_t len, struct strv *out,
bool bound[ACTION_COUNT])
{
for (enum action i = 0; i < ACTION_COUNT; i++)
{
struct strv ass = strv_make ();
for (size_t k = 0; k < len; k++)
if (keys[k].action == i)
strv_append_owned (&ass, app_strfkey (&keys[k].decoded));
if (ass.len)
{
char *joined = strv_join (&ass, ", ");
strv_append_owned (out, xstrdup_printf
(" %s%c%s", g_action_descriptions[i], 0, joined));
free (joined);
bound[i] = true;
help_tab_assign_action (i);
}
strv_free (&ass);
}
}
static void
help_tab_unbound (struct strv *out, bool bound[ACTION_COUNT])
{
for (enum action i = 0; i < ACTION_COUNT; i++)
if (!bound[i])
{
strv_append_owned (out,
xstrdup_printf (" %s%c", g_action_descriptions[i], 0));
help_tab_assign_action (i);
}
}
static struct layout
help_tab_on_item_layout (size_t item_index)
{
hard_assert (item_index < g_help_tab.lines.len);
const char *line = g_help_tab.lines.vector[item_index];
struct layout l = {};
app_push_fill (&l, g.ui->label (*line == ' ' ? 0 : A_BOLD, line));
const char *definition = strchr (line, 0) + 1;
if (*line == ' ' && *definition)
{
app_push (&l, g.ui->padding (0, 0.5, 1));
app_push_fill (&l, g.ui->label (0, definition));
}
return l;
}
static struct tab *
help_tab_init (void)
{
ARRAY_INIT (g_help_tab.actions);
struct strv *lines = &g_help_tab.lines;
*lines = strv_make ();
bool bound[ACTION_COUNT] = { [ACTION_NONE] = true };
strv_append (lines, "Normal mode actions");
help_tab_group (g_normal_keys, g_normal_keys_len, lines, bound);
strv_append (lines, "");
strv_append (lines, "Editor mode actions");
help_tab_group (g_editor_keys, g_editor_keys_len, lines, bound);
strv_append (lines, "");
bool have_unbound = false;
for (enum action i = 0; i < ACTION_COUNT; i++)
if (!bound[i])
have_unbound = true;
if (have_unbound)
{
strv_append (lines, "Unbound actions");
help_tab_unbound (lines, bound);
strv_append (lines, "");
}
struct tab *super = &g_help_tab.super;
tab_init (super, "Help");
super->on_action = help_tab_on_action;
super->on_item_layout = help_tab_on_item_layout;
super->item_count = lines->len;
return super;
}
// --- Debug tab ---------------------------------------------------------------
struct debug_item
{
char *text; ///< Logged line
int64_t timestamp; ///< Timestamp
chtype attrs; ///< Line attributes
};
static struct
{
struct tab super; ///< Parent class
ARRAY (struct debug_item, items) ///< Items
bool active; ///< The tab is present
}
g_debug_tab;
static struct layout
debug_tab_on_item_layout (size_t item_index)
{
hard_assert (item_index < g_debug_tab.items_len);
struct debug_item *item = &g_debug_tab.items[item_index];
char buf[16];
struct tm tm;
time_t when = item->timestamp / 1000;
strftime (buf, sizeof buf, "%T", localtime_r (&when, &tm));
char *prefix = xstrdup_printf
("%s.%03d", buf, (int) (item->timestamp % 1000));
struct layout l = {};
app_push (&l, g.ui->label (0, prefix));
app_push (&l, g.ui->padding (item->attrs, 0.5, 1));
app_push_fill (&l, g.ui->label (item->attrs, item->text));
free (prefix);
return l;
}
static void
debug_tab_push (char *message, chtype attrs)
{
ARRAY_RESERVE (g_debug_tab.items, 1);
struct debug_item *item = &g_debug_tab.items[g_debug_tab.items_len++];
g_debug_tab.super.item_count = g_debug_tab.items_len;
item->text = message;
item->attrs = attrs;
item->timestamp = clock_msec (CLOCK_REALTIME);
app_invalidate ();
}
static struct tab *
debug_tab_init (void)
{
ARRAY_INIT (g_debug_tab.items);
g_debug_tab.active = true;
struct tab *super = &g_debug_tab.super;
tab_init (super, "Debug");
super->on_item_layout = debug_tab_on_item_layout;
return super;
}
// --- Spectrum analyser -------------------------------------------------------
#ifdef WITH_FFTW
static void
spectrum_redraw (void)
{
// A full refresh would be too computationally expensive,
// let's hack around it in this case
struct widget *spectrum = NULL;
LIST_FOR_EACH (struct widget, w, g.widgets.head)
if (w->id == WIDGET_SPECTRUM)
spectrum = w;
if (spectrum)
spectrum->on_render (spectrum);
poller_idle_set (&g.flip_event);
}
// When any problem occurs with the FIFO, we'll just give up on it completely
static void
spectrum_discard_fifo (void)
{
if (g.spectrum_fd != -1)
{
poller_fd_reset (&g.spectrum_event);
xclose (g.spectrum_fd);
g.spectrum_fd = -1;
spectrum_free (&g.spectrum);
app_invalidate ();
}
}
static void
spectrum_on_fifo_readable (const struct pollfd *pfd, void *user_data)
{
(void) user_data;
struct spectrum *s = &g.spectrum;
bool update = false;
ssize_t n;
restart:
while ((n = read (pfd->fd,
s->buffer + s->buffer_len, s->buffer_size - s->buffer_len)) > 0)
if ((s->buffer_len += n) == s->buffer_size)
{
update = true;
spectrum_sample (s);
s->buffer_len = 0;
}
if (!n)
spectrum_discard_fifo ();
else if (errno == EINTR)
goto restart;
else if (errno != EAGAIN)
{
print_error ("spectrum: %s", strerror (errno));
spectrum_discard_fifo ();
}
else if (update)
spectrum_redraw ();
}
// When playback is stopped, we need to feed the analyser some zeroes ourselves.
// We could also just hide it. Hard to say which is simpler or better.
static void
spectrum_clear (void)
{
if (g.spectrum_fd != -1)
{
struct spectrum *s = &g.spectrum;
memset (s->buffer, 0, s->buffer_size);
spectrum_sample (s);
spectrum_sample (s);
s->buffer_len = 0;
spectrum_redraw ();
}
}
static void
spectrum_setup_fifo (void)
{
const char *spectrum_path =
get_config_string (g.config.root, "settings.spectrum_path");
const char *spectrum_format =
get_config_string (g.config.root, "settings.spectrum_format");
struct config_item *spectrum_bars =
config_item_get (g.config.root, "settings.spectrum_bars", NULL);
struct config_item *spectrum_fps =
config_item_get (g.config.root, "settings.spectrum_fps", NULL);
if (!spectrum_path)
return;
struct error *e = NULL;
char *path = resolve_filename
(spectrum_path, resolve_relative_config_filename);
if (!path)
print_error ("spectrum: %s", "FIFO path could not be resolved");
else if (!g.locale_is_utf8)
print_error ("spectrum: %s", "UTF-8 locale required");
else if (!spectrum_init (&g.spectrum, (char *) spectrum_format,
spectrum_bars->value.integer, spectrum_fps->value.integer, &e))
{
print_error ("spectrum: %s", e->message);
error_free (e);
}
else if ((g.spectrum_fd = open (path, O_RDONLY | O_NONBLOCK)) == -1)
{
print_error ("spectrum: %s: %s", path, strerror (errno));
spectrum_free (&g.spectrum);
}
else
{
g.spectrum_event = poller_fd_make (&g.poller, g.spectrum_fd);
g.spectrum_event.dispatcher = spectrum_on_fifo_readable;
poller_fd_set (&g.spectrum_event, POLLIN);
}
free (path);
}
#else // ! WITH_FFTW
#define spectrum_setup_fifo() BLOCK_START BLOCK_END
#define spectrum_clear() BLOCK_START BLOCK_END
#define spectrum_discard_fifo() BLOCK_START BLOCK_END
#endif // ! WITH_FFTW
// --- PulseAudio --------------------------------------------------------------
#ifdef WITH_PULSE
static bool
mpd_find_output (const struct strv *data, const char *wanted)
{
// The plugin field is new in MPD 0.21, by default take any output
unsigned long n, accept = 1;
for (size_t i = data->len; i--; )
{
char *key, *value;
if (!(key = mpd_parse_kv (data->vector[i], &value)))
continue;
if (!strcasecmp_ascii (key, "outputid"))
{
if (accept)
return true;
accept = 1;
}
else if (!strcasecmp_ascii (key, "plugin"))
accept &= !strcmp (value, wanted);
else if (!strcasecmp_ascii (key, "outputenabled")
&& xstrtoul (&n, value, 10))
accept &= n == 1;
}
return false;
}
static void
mpd_on_outputs_response (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
(void) user_data;
// TODO: check whether an action is actually necessary
pulse_free (&g.pulse);
if (response->success && !mpd_find_output (data, "pulse"))
print_debug ("MPD has no PulseAudio output to control");
else
{
pulse_init (&g.pulse, &g.poller);
g.pulse.on_update = app_invalidate;
}
app_invalidate ();
}
static void
pulse_update (void)
{
struct mpd_client *c = &g.client;
if (!g.pulse_control_requested)
return;
// The read permission is sufficient for this command
mpd_client_send_command (c, "outputs", NULL);
mpd_client_add_task (c, mpd_on_outputs_response, NULL);
mpd_client_idle (c, 0);
}
static void
pulse_disable (void)
{
pulse_free (&g.pulse);
app_invalidate ();
}
#else // ! WITH_PULSE
#define pulse_update() BLOCK_START BLOCK_END
#define pulse_disable() BLOCK_START BLOCK_END
#endif // ! WITH_PULSE
// --- MPD interface -----------------------------------------------------------
static void
mpd_update_playlist_time (void)
{
g.playlist_time = 0;
// It would also be possible to retrieve this from "stats" -> "playtime"
unsigned long n;
for (size_t i = 0; i < g.playlist.len; i++)
{
compact_map_t map = item_list_get (&g.playlist, i);
const char *time = compact_map_find (map, "time");
if (time && xstrtoul (&n, time, 10))
g.playlist_time += n;
}
}
static void
mpd_set_elapsed_timer (int msec_past_second)
{
int delay_msec = 1000 - msec_past_second; // Until the next round second
if (!g.elapsed_poll)
{
poller_timer_set (&g.elapsed_event, delay_msec);
// Remember when the last round second was, relative to monotonic time
g.elapsed_since = clock_msec (CLOCK_BEST) - msec_past_second;
return;
}
// We may receive an earlier time, this seems to compensate for it well
// (I haven't seen it trigger more than 50ms too early)
delay_msec += 100;
// When playback stalls, avoid busy looping with the server
int elapsed_msec = g.song_elapsed * 1000 + msec_past_second;
if (elapsed_msec == g.elapsed_since)
delay_msec = MAX (delay_msec, 500);
// In polling mode, we're interested in progress rather than stability.
// We can reuse both the poller_timer struct and the timestamp field.
poller_timer_set (&g.elapsed_event, delay_msec);
g.elapsed_since = elapsed_msec;
}
static void
mpd_update_playback_state (void)
{
struct str_map *map = &g.playback_info;
g.song_elapsed = g.song_duration = g.volume = g.song = -1;
uint32_t last_playlist_version = g.playlist_version;
g.playlist_version = 0;
const char *state;
g.state = PLAYER_STOPPED;
if ((state = str_map_find (map, "state")))
{
if (!strcmp (state, "play")) g.state = PLAYER_PLAYING;
if (!strcmp (state, "pause")) g.state = PLAYER_PAUSED;
}
if (g.state == PLAYER_STOPPED)
{
spectrum_clear ();
}
// Values in "time" are always rounded. "elapsed", introduced in MPD 0.16,
// is in millisecond precision and "duration" as well, starting with 0.20.
// Prefer the more precise values but use what we have.
const char *time = str_map_find (map, "time");
const char *elapsed = str_map_find (map, "elapsed");
const char *duration = str_map_find (map, "duration");
struct strv fields = strv_make ();
if (time)
{
cstr_split (time, ":", false, &fields);
if (fields.len >= 1 && !elapsed) elapsed = fields.vector[0];
if (fields.len >= 2 && !duration) duration = fields.vector[1];
}
int msec_past_second = 0;
mpd_read_time (elapsed, &g.song_elapsed, &msec_past_second);
mpd_read_time (duration, &g.song_duration, NULL);
strv_free (&fields);
poller_timer_reset (&g.elapsed_event);
if (g.state == PLAYER_PLAYING)
mpd_set_elapsed_timer (msec_past_second);
else
g.elapsed_since = -1;
// The server sends -1 when nothing is being played right now
unsigned long n;
if (xstrtoul_map (map, "volume", &n)) g.volume = n;
if (xstrtoul_map (map, "playlist", &n)) g.playlist_version = n;
if (xstrtoul_map (map, "song", &n)) g.song = n;
if (g.playlist_version != last_playlist_version)
mpd_update_playlist_time ();
app_invalidate ();
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
mpd_process_info_data (const struct strv *data)
{
struct str_map *map = &g.playback_info;
// First there's the status, followed by playlist items chunked by "file"
unsigned long n; char *key, *value;
for (size_t i = 0; i < data->len - 1 && data->vector[i]; i++)
{
if (!(key = mpd_parse_kv (data->vector[i], &value)))
continue;
if (!strcasecmp_ascii (key, "playlistlength")
&& xstrtoul (&n, value, 10))
item_list_resize (&g.playlist, n);
str_map_set (map, key, xstrdup (value));
}
// It's much better to process the playlist from the back
struct str_map item = str_map_make (NULL);
item.key_xfrm = tolower_ascii_strxfrm;
for (size_t i = data->len - 1; i-- && data->vector[i]; )
{
if (!(key = mpd_parse_kv (data->vector[i], &value)))
continue;
str_map_set (&item, key, value);
if (!strcasecmp_ascii (key, "file"))
{
if (xstrtoul_map (&item, "pos", &n))
item_list_set (&g.playlist, n, &item);
str_map_clear (&item);
}
}
str_map_free (&item);
}
/// Find a song by its id in the current playlist. Expensive, rarely called.
static ssize_t
mpd_find_pos_of_id (const char *desired_id)
{
compact_map_t map;
const char *id;
for (size_t i = 0; i < g.playlist.len; i++)
{
if ((map = item_list_get (&g.playlist, i))
&& (id = compact_map_find (map, "id"))
&& !strcmp (id, desired_id))
return i;
}
return -1;
}
static const char *
mpd_id_of_pos (int pos)
{
compact_map_t map = item_list_get (&g.playlist, pos);
return map ? compact_map_find (map, "id") : NULL;
}
static void
mpd_process_info (const struct strv *data)
{
struct tab *tab = &g_current_tab;
char *prev_sel_id = xstrdup0 (mpd_id_of_pos (tab->item_selected));
char *prev_mark_id = xstrdup0 (mpd_id_of_pos (tab->item_mark));
char *fallback_id = NULL;
struct tab_range r = tab_selection_range (g.active_tab);
if (r.upto >= 0)
{
if (!(fallback_id = xstrdup0 (mpd_id_of_pos (r.upto + 1))))
fallback_id = xstrdup0 (mpd_id_of_pos (r.from - 1));
}
mpd_process_info_data (data);
const char *sel_id = mpd_id_of_pos (tab->item_selected);
const char *mark_id = mpd_id_of_pos (tab->item_mark);
if (prev_mark_id && (!mark_id || strcmp (prev_mark_id, mark_id)))
tab->item_mark = mpd_find_pos_of_id (prev_mark_id);
if (prev_sel_id && (!sel_id || strcmp (prev_sel_id, sel_id)))
{
if ((tab->item_selected = mpd_find_pos_of_id (prev_sel_id)) < 0)
{
tab->item_mark = -1;
if (fallback_id)
tab->item_selected = mpd_find_pos_of_id (fallback_id);
}
app_move_selection (0);
}
free (prev_sel_id);
free (prev_mark_id);
free (fallback_id);
}
static void
mpd_on_info_response (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
(void) user_data;
// TODO: preset an error player state?
str_map_clear (&g.playback_info);
if (!response->success)
print_error ("%s: %s",
"MPD status retrieval failed", response->message_text);
else if (!data->len)
print_debug ("empty MPD status response");
else
mpd_process_info (data);
mpd_update_playback_state ();
current_tab_update ();
info_tab_update ();
}
static void
mpd_on_elapsed_time_tick (void *user_data)
{
(void) user_data;
// Compute how much time has elapsed since the last round second
int64_t diff_msec = clock_msec (CLOCK_BEST) - g.elapsed_since;
int elapsed_sec = diff_msec / 1000;
int elapsed_msec = diff_msec % 1000;
g.song_elapsed += elapsed_sec;
g.elapsed_since += elapsed_sec * 1000;
// Try to get called on the next round second of playback
poller_timer_set (&g.elapsed_event, 1000 - elapsed_msec);
app_invalidate ();
}
static void
mpd_request_info (void)
{
struct mpd_client *c = &g.client;
mpd_client_list_ok_begin (c);
mpd_client_send_command (c, "status", NULL);
char *last_version = xstrdup_printf ("%" PRIu32, g.playlist_version);
mpd_client_send_command (c, "plchanges", last_version, NULL);
free (last_version);
mpd_client_list_end (c);
mpd_client_add_task (c, mpd_on_info_response, NULL);
mpd_client_idle (c, 0);
}
static void
mpd_on_elapsed_time_tick_poll (void *user_data)
{
(void) user_data;
// As soon as the reply arrives, we (may) set the timer again
mpd_request_info ();
}
static void
mpd_on_events (unsigned subsystems, void *user_data)
{
(void) user_data;
struct mpd_client *c = &g.client;
if (subsystems & MPD_SUBSYSTEM_DATABASE)
library_tab_reload (NULL);
if (subsystems & MPD_SUBSYSTEM_OUTPUT)
pulse_update ();
if (subsystems & (MPD_SUBSYSTEM_PLAYER | MPD_SUBSYSTEM_OPTIONS
| MPD_SUBSYSTEM_PLAYLIST | MPD_SUBSYSTEM_MIXER | MPD_SUBSYSTEM_UPDATE))
mpd_request_info ();
else
mpd_client_idle (c, 0);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
mpd_queue_reconnect (void)
{
poller_timer_set (&g.connect_event, 5 * 1000);
}
// On an error, MPD discards the rest of our enqueuing commands--work it around
static void mpd_enqueue_step (size_t start_offset);
static void
mpd_on_enqueue_response (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
(void) data;
intptr_t start_offset = (intptr_t) user_data;
if (response->success)
strv_reset (&g.enqueue);
else
{
// Their addition may also overflow, but YOLO
hard_assert (start_offset >= 0 && response->list_offset >= 0);
print_error ("%s: %s", response->message_text,
g.enqueue.vector[start_offset + response->list_offset]);
mpd_enqueue_step (start_offset + response->list_offset + 1);
}
}
static void
mpd_enqueue_step (size_t start_offset)
{
struct mpd_client *c = &g.client;
if (start_offset >= g.enqueue.len)
{
strv_reset (&g.enqueue);
return;
}
// TODO: might want to consider using addid and autoplaying
mpd_client_list_begin (c);
for (size_t i = start_offset; i < g.enqueue.len; i++)
mpd_client_send_command (c, "add", g.enqueue.vector[i], NULL);
mpd_client_list_end (c);
mpd_client_add_task (c, mpd_on_enqueue_response, (void *) start_offset);
mpd_client_idle (c, 0);
}
static void
mpd_on_ready (void)
{
mpd_request_info ();
library_tab_reload (NULL);
spectrum_setup_fifo ();
pulse_update ();
mpd_enqueue_step (0);
}
static void
mpd_on_password_response (const struct mpd_response *response,
const struct strv *data, void *user_data)
{
(void) data;
(void) user_data;
struct mpd_client *c = &g.client;
if (response->success)
mpd_on_ready ();
else
{
print_error ("%s: %s",
"MPD authentication failed", response->message_text);
mpd_client_send_command (c, "close", NULL);
}
}
static void
mpd_on_connected (void *user_data)
{
(void) user_data;
struct mpd_client *c = &g.client;
const char *password =
get_config_string (g.config.root, "settings.password");
if (password)
{
mpd_client_send_command (c, "password", password, NULL);
mpd_client_add_task (c, mpd_on_password_response, NULL);
}
else
mpd_on_ready ();
}
static void
mpd_on_failure (void *user_data)
{
(void) user_data;
// This is also triggered both by a failed connect and a clean disconnect
print_debug ("connection to MPD failed");
mpd_queue_reconnect ();
str_map_clear (&g.playback_info);
item_list_resize (&g.playlist, 0);
mpd_update_playback_state ();
current_tab_update ();
info_tab_update ();
spectrum_discard_fifo ();
pulse_disable ();
}
static void
mpd_on_io_hook (void *user_data, bool outgoing, const char *line)
{
(void) user_data;
if (outgoing)
debug_tab_push (xstrdup_printf ("<< %s", line), APP_ATTR (OUTGOING));
else
debug_tab_push (xstrdup_printf (">> %s", line), APP_ATTR (INCOMING));
}
static void
app_on_reconnect (void *user_data)
{
(void) user_data;
struct mpd_client *c = &g.client;
c->on_failure = mpd_on_failure;
c->on_connected = mpd_on_connected;
c->on_event = mpd_on_events;
if (g_debug_mode)
c->on_io_hook = mpd_on_io_hook;
// We accept hostname/IPv4/IPv6 in pseudo-URL format, as well as sockets
char *address = xstrdup (get_config_string (g.config.root,
"settings.address")), *p = address, *host = address, *port = "6600";
// Unwrap IPv6 addresses in format_host_port_pair() format
char *right_bracket = strchr (p, ']');
if (p[0] == '[' && right_bracket)
{
*right_bracket = '\0';
host = p + 1;
p = right_bracket + 1;
}
char *colon = strchr (p, ':');
if (colon)
{
*colon = '\0';
port = colon + 1;
}
struct error *e = NULL;
if (!mpd_client_connect (c, host, port, &e))
{
print_error ("%s: %s", "cannot connect to MPD", e->message);
error_free (e);
mpd_queue_reconnect ();
}
free (address);
app_invalidate ();
}
// --- TUI ---------------------------------------------------------------------
static void
tui_flush_buffer (struct widget *self, struct row_buffer *buf)
{
move (self->y, self->x);
int space = MIN (self->width, g.ui_width - self->x);
row_buffer_align (buf, space, self->attrs);
row_buffer_flush (buf);
row_buffer_free (buf);
}
static void
tui_render_padding (struct widget *self)
{
struct row_buffer buf = row_buffer_make ();
tui_flush_buffer (self, &buf);
}
static struct widget *
tui_make_padding (chtype attrs, float width, float height)
{
struct widget *w = xcalloc (1, sizeof *w + 2);
w->text[0] = ' ';
w->on_render = tui_render_padding;
w->attrs = attrs;
w->width = width * 2;
w->height = height;
return w;
}
static void
tui_render_label (struct widget *self)
{
struct row_buffer buf = row_buffer_make ();
row_buffer_append (&buf, self->text, self->attrs);
tui_flush_buffer (self, &buf);
}
static struct widget *
tui_make_label (chtype attrs, const char *label)
{
size_t len = strlen (label);
struct widget *w = xcalloc (1, sizeof *w + len + 1);
w->on_render = tui_render_label;
w->attrs = attrs;
memcpy (w + 1, label, len);
struct row_buffer buf = row_buffer_make ();
row_buffer_append (&buf, w->text, w->attrs);
w->width = buf.total_width;
w->height = 1;
row_buffer_free (&buf);
return w;
}
static struct widget *
tui_make_button (chtype attrs, const char *label, enum action a)
{
struct widget *w = tui_make_label (attrs, label);
w->id = WIDGET_BUTTON;
w->subid = a;
return w;
}
static void
tui_render_gauge (struct widget *self)
{
struct row_buffer buf = row_buffer_make ();
if (g.state == PLAYER_STOPPED || g.song_elapsed < 0 || g.song_duration < 1)
goto out;
float ratio = (float) g.song_elapsed / g.song_duration;
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 * self->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 = self->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));
out:
tui_flush_buffer (self, &buf);
}
// TODO: Perhaps it should save the number within.
static struct widget *
tui_make_gauge (chtype attrs)
{
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = tui_render_gauge;
w->attrs = attrs;
w->width = -1;
w->height = 1;
return w;
}
static void
tui_render_spectrum (struct widget *self)
{
// Don't mess up the line editor caret, when it's shown
int last_x, last_y;
getyx (stdscr, last_y, last_x);
struct row_buffer buf = row_buffer_make ();
#ifdef WITH_FFTW
row_buffer_append (&buf, g.spectrum.rendered, self->attrs);
#endif // WITH_FFTW
tui_flush_buffer (self, &buf);
move (last_y, last_x);
}
static struct widget *
tui_make_spectrum (chtype attrs, int width)
{
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = tui_render_spectrum;
w->attrs = attrs;
w->width = width;
w->height = 1;
return w;
}
static void
tui_render_scrollbar (struct widget *self)
{
// 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).
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 (self->y + row, self->x);
if (row < bar.start || row >= bar.start + bar.length)
addch (' ' | self->attrs);
else
addch (' ' | self->attrs | A_REVERSE);
}
return;
}
struct scrollbar bar = app_compute_scrollbar (tab, visible_items * 8, 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 = self->attrs;
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 (self->y + row, self->x);
struct row_buffer buf = row_buffer_make ();
row_buffer_append (&buf, c, attrs);
row_buffer_flush (&buf);
row_buffer_free (&buf);
}
}
static struct widget *
tui_make_scrollbar (chtype attrs)
{
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = tui_render_scrollbar;
w->attrs = attrs;
w->width = 1;
return w;
}
static void
tui_render_list (struct widget *self)
{
LIST_FOR_EACH (struct widget, w, self->on_sublayout (self))
{
w->on_render (w);
free (w);
}
}
static struct widget *
tui_make_list (void)
{
struct widget *w = xcalloc (1, sizeof *w + 1);
w->width = -1;
w->height = g.active_tab->item_count;
w->on_render = tui_render_list;
w->on_sublayout = app_sublayout_list;
return w;
}
static void
tui_render_editor (struct widget *self)
{
struct row_buffer buf = row_buffer_make ();
int caret = line_editor_write (&g.editor, &buf, self->width, self->attrs);
tui_flush_buffer (self, &buf);
// FIXME: This should be at the end of of tui_render().
move (self->y, self->x + caret);
curs_set (1);
}
static struct widget *
tui_make_editor (chtype attrs)
{
// TODO: This should ideally measure the text, and copy it to w->text.
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = tui_render_editor;
w->attrs = attrs;
w->width = -1;
w->height = 1;
return w;
}
static void
tui_render (void)
{
erase ();
curs_set (0);
LIST_FOR_EACH (struct widget, w, g.widgets.head)
if (w->width >= 0 && w->height >= 0)
w->on_render (w);
}
static void
tui_flip (void)
{
// Curses handles double-buffering for us automatically.
refresh ();
}
static void
tui_winch (void)
{
// The standard endwin/refresh sequence makes the terminal flicker
#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
g.ui_width = COLS;
g.ui_height = LINES;
app_invalidate ();
}
static void
tui_destroy (void)
{
endwin ();
}
static struct ui tui_ui =
{
.padding = tui_make_padding,
.label = tui_make_label,
.button = tui_make_button,
.gauge = tui_make_gauge,
.spectrum = tui_make_spectrum,
.scrollbar = tui_make_scrollbar,
.list = tui_make_list,
.editor = tui_make_editor,
.render = tui_render,
.flip = tui_flip,
.winch = tui_winch,
.destroy = tui_destroy,
};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static void
tui_on_tty_event (termo_key_t *event, int64_t event_ts)
{
// Simple double click detection via release--press delay, only a bit
// complicated by the fact that we don't know what's being released
static termo_key_t last_event;
static int64_t last_event_ts;
static int last_button;
int y, x, button, y_last, x_last, modifiers = 0;
termo_mouse_event_t type, type_last;
if (termo_interpret_mouse (g.tk, event, &type, &button, &y, &x))
{
if (termo_interpret_mouse
(g.tk, &last_event, &type_last, NULL, &y_last, &x_last)
&& event_ts - last_event_ts < 500
&& type_last == TERMO_MOUSE_RELEASE && type == TERMO_MOUSE_PRESS
&& y_last == y && x_last == x && last_button == button)
{
modifiers |= APP_KEYMOD_DOUBLE_CLICK;
// Prevent interpreting triple clicks as two double clicks.
last_button = 0;
}
else if (type == TERMO_MOUSE_PRESS)
last_button = button;
if (!app_process_mouse (type, x, y, button, modifiers))
beep ();
}
else if (!app_process_termo_event (event))
beep ();
last_event = *event;
last_event_ts = event_ts;
}
static void
tui_on_tty_readable (const struct pollfd *fd, void *user_data)
{
(void) user_data;
if (fd->revents & ~(POLLIN | POLLHUP | POLLERR))
print_debug ("fd %d: unexpected revents: %d", fd->fd, fd->revents);
poller_timer_reset (&g.tk_timer);
termo_advisereadable (g.tk);
termo_key_t event;
int64_t event_ts = clock_msec (CLOCK_BEST);
termo_result_t res;
while ((res = termo_getkey (g.tk, &event)) == TERMO_RES_KEY)
tui_on_tty_event (&event, event_ts);
if (res == TERMO_RES_AGAIN)
poller_timer_set (&g.tk_timer, termo_get_waittime (g.tk));
else if (res == TERMO_RES_ERROR || res == TERMO_RES_EOF)
app_quit ();
}
static void
tui_on_key_timer (void *user_data)
{
(void) user_data;
termo_key_t event;
if (termo_getkey_force (g.tk, &event) == TERMO_RES_KEY)
if (!app_process_termo_event (&event))
beep ();
}
static void
tui_init (void)
{
poller_fd_set (&g.tty_event, POLLIN);
if (!termo_start (g.tk) || !initscr () || nonl () == ERR)
exit_fatal ("failed to set up the terminal");
termo_set_mouse_tracking_mode (g.tk, TERMO_MOUSE_TRACKING_DRAG);
g.ui = &tui_ui;
g.ui_width = COLS;
g.ui_height = LINES;
g.ui_vunit = 1;
g.ui_hunit = 1;
// 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
// FIXME: that's a lie now, MULTISELECT requires a colour
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);
}
}
// --- X11 ---------------------------------------------------------------------
#ifdef WITH_X11
static XRenderColor x11_default_fg = { .alpha = 0xffff };
static XRenderColor x11_default_bg = { 0xffff, 0xffff, 0xffff, 0xffff };
static XErrorHandler x11_default_error_handler;
static XftFont *
x11_font (struct widget *self)
{
return (self->attrs & A_BOLD) ? g.xft_bold : g.xft_regular;
}
static XRenderColor *
x11_fg_attrs (chtype attrs)
{
int pair = PAIR_NUMBER (attrs);
if (!pair--)
return &x11_default_fg;
return (attrs & A_REVERSE) ? &g.x_bg[pair] : &g.x_fg[pair];
}
static XRenderColor *
x11_fg (struct widget *self)
{
return x11_fg_attrs (self->attrs);
}
static XRenderColor *
x11_bg_attrs (chtype attrs)
{
int pair = PAIR_NUMBER (attrs);
if (!pair--)
return &x11_default_bg;
return (attrs & A_REVERSE) ? &g.x_fg[pair] : &g.x_bg[pair];
}
static XRenderColor *
x11_bg (struct widget *self)
{
return x11_bg_attrs (self->attrs);
}
static void
x11_render_padding (struct widget *self)
{
if (PAIR_NUMBER (self->attrs))
{
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
x11_bg (self), self->x, self->y, self->width, self->height);
}
if (self->attrs & A_UNDERLINE)
{
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
x11_fg (self), self->x, self->y + self->height - 1, self->width, 1);
}
}
static struct widget *
x11_make_padding (chtype attrs, float width, float height)
{
struct widget *w = xcalloc (1, sizeof *w + 2);
w->text[0] = ' ';
w->on_render = x11_render_padding;
w->attrs = attrs;
w->width = g.ui_vunit * width;
w->height = g.ui_vunit * height;
return w;
}
static void
x11_render_label (struct widget *self)
{
x11_render_padding (self);
int space = MIN (self->width, g.ui_width - self->x);
if (space <= 0)
return;
// TODO: Try to avoid re-measuring on each render.
XftFont *font = x11_font (self);
XGlyphInfo extents = {};
XftTextExtentsUtf8 (g.dpy, font,
(const FcChar8 *) self->text, strlen (self->text), &extents);
if (extents.xOff <= space)
{
XftColor color = { .color = *x11_fg (self) };
XftDrawStringUtf8 (g.xft_draw, &color, font,
self->x, self->y + font->ascent,
(const FcChar8 *) self->text, strlen (self->text));
return;
}
// XRender doesn't extend gradients beyond their end stops.
XRenderColor solid = *x11_fg (self), colors[3] = { solid, solid, solid };
colors[2].alpha = 0;
double portion = MIN (1, 2.0 * font->height / space);
XFixed stops[3] = { 0, XDoubleToFixed (1 - portion), XDoubleToFixed (1) };
XLinearGradient gradient = { {}, { XDoubleToFixed (space), 0 } };
// Note that this masking is a very expensive operation.
Picture source =
XRenderCreateLinearGradient (g.dpy, &gradient, stops, colors, 3);
XftTextRenderUtf8 (g.dpy, PictOpOver, source, font, g.x11_pixmap_picture,
-self->x, 0, self->x, self->y + font->ascent,
(const FcChar8 *) self->text, strlen (self->text));
XRenderFreePicture (g.dpy, source);
}
static struct widget *
x11_make_label (chtype attrs, const char *label)
{
// Xft renders combining marks by themselves, NFC improves it a bit.
size_t label_len = strlen (label) + 1, normalized_len = 0;
uint8_t *normalized = u8_normalize (UNINORM_NFC,
(const uint8_t *) label, label_len, NULL, &normalized_len);
if (!normalized)
{
normalized = memcpy (xmalloc (label_len), label, label_len);
normalized_len = label_len;
}
struct widget *w = xcalloc (1, sizeof *w + normalized_len);
w->on_render = x11_render_label;
w->attrs = attrs;
memcpy (w + 1, normalized, normalized_len);
XftFont *font = x11_font (w);
XGlyphInfo extents = {};
XftTextExtentsUtf8 (g.dpy, font, normalized, normalized_len - 1, &extents);
w->width = extents.xOff;
w->height = font->height;
free (normalized);
return w;
}
// On a 20x20 raster to make it feasible to design on paper.
#define X11_STOP {INFINITY, INFINITY}
static const XPointDouble
x11_icon_previous[] =
{
{10, 0}, {0, 10}, {10, 20}, X11_STOP,
{20, 0}, {10, 10}, {20, 20}, X11_STOP, X11_STOP,
},
x11_icon_pause[] =
{
{1, 0}, {7, 0}, {7, 20}, {1, 20}, X11_STOP,
{13, 0}, {19, 0}, {19, 20}, {13, 20}, X11_STOP, X11_STOP,
},
x11_icon_play[] =
{
{0, 0}, {20, 10}, {0, 20}, X11_STOP, X11_STOP,
},
x11_icon_stop[] =
{
{0, 0}, {20, 0}, {20, 20}, {0, 20}, X11_STOP, X11_STOP,
},
x11_icon_next[] =
{
{0, 0}, {10, 10}, {0, 20}, X11_STOP,
{10, 0}, {20, 10}, {10, 20}, X11_STOP, X11_STOP,
},
x11_icon_repeat[] =
{
{0, 12}, {0, 6}, {3, 3}, {13, 3}, {13, 0}, {20, 4.5},
{13, 9}, {13, 6}, {3, 6}, {3, 10}, X11_STOP,
{0, 15.5}, {7, 11}, {7, 14}, {17, 14}, {17, 10}, {20, 8},
{20, 14}, {17, 17}, {7, 17}, {7, 20}, X11_STOP, X11_STOP,
},
x11_icon_random[] =
{
{0, 6}, {0, 3}, {5, 3}, {6, 4.5}, {4, 7.5}, {3, 6}, X11_STOP,
{9, 15.5}, {11, 12.5}, {12, 14}, {13, 14}, {13, 11}, {20, 15.5},
{13, 20}, {13, 17}, {10, 17}, X11_STOP,
{0, 17}, {0, 14}, {3, 14}, {10, 3}, {13, 3}, {13, 0}, {20, 4.5},
{13, 9}, {13, 6}, {12, 6}, {5, 17}, X11_STOP, X11_STOP,
},
x11_icon_single[] =
{
{7, 6}, {7, 4}, {9, 2}, {12, 2}, {12, 15}, {14, 15}, {14, 18},
{7, 18}, {7, 15}, {9, 15}, {9, 6}, X11_STOP, X11_STOP,
},
x11_icon_consume[] =
{
{0, 13}, {0, 7}, {4, 3}, {10, 3}, {14, 7}, {5, 10}, {14, 13},
{10, 17}, {4, 17}, X11_STOP,
{16, 12}, {16, 8}, {20, 8}, {20, 12}, X11_STOP, X11_STOP,
};
static const XPointDouble *
x11_icon_for_action (enum action action)
{
switch (action)
{
case ACTION_MPD_PREVIOUS:
return x11_icon_previous;
case ACTION_MPD_TOGGLE:
return g.state == PLAYER_PLAYING ? x11_icon_pause : x11_icon_play;
case ACTION_MPD_STOP:
return x11_icon_stop;
case ACTION_MPD_NEXT:
return x11_icon_next;
case ACTION_MPD_REPEAT:
return x11_icon_repeat;
case ACTION_MPD_RANDOM:
return x11_icon_random;
case ACTION_MPD_SINGLE:
return x11_icon_single;
case ACTION_MPD_CONSUME:
return x11_icon_consume;
default:
return NULL;
}
}
static void
x11_render_button (struct widget *self)
{
x11_render_padding (self);
const XPointDouble *icon = x11_icon_for_action (self->subid);
if (!icon)
{
x11_render_label (self);
return;
}
size_t total = 0;
for (size_t i = 0; icon[i].x != INFINITY || icon[i - 1].x != INFINITY; i++)
total++;
// TODO: There should be an attribute for buttons, to handle this better.
XRenderColor color = *x11_fg (self);
if (!(self->attrs & A_BOLD))
{
color.alpha /= 2;
color.red /= 2;
color.green /= 2;
color.blue /= 2;
}
Picture source = XRenderCreateSolidFill (g.dpy, &color);
const XRenderPictFormat *format
= XRenderFindStandardFormat (g.dpy, PictStandardA8);
int x = self->x, y = self->y + (self->height - self->width) / 2;
XPointDouble buffer[total], *p = buffer;
for (size_t i = 0; i < total; i++)
if (icon[i].x != INFINITY)
{
p->x = x + icon[i].x / 20.0 * self->width;
p->y = y + icon[i].y / 20.0 * self->width;
p++;
}
else if (p != buffer)
{
XRenderCompositeDoublePoly (g.dpy, PictOpOver,
source, g.x11_pixmap_picture, format,
0, 0, 0, 0, buffer, p - buffer, EvenOddRule);
p = buffer;
}
XRenderFreePicture (g.dpy, source);
}
static struct widget *
x11_make_button (chtype attrs, const char *label, enum action a)
{
struct widget *w = x11_make_label (attrs, label);
w->id = WIDGET_BUTTON;
w->subid = a;
if (x11_icon_for_action (a))
{
w->on_render = x11_render_button;
// It should be padded by the caller horizontally.
w->height = g.ui_vunit;
w->width = w->height * 3 / 4;
}
return w;
}
static void
x11_render_gauge (struct widget *self)
{
x11_render_padding (self);
if (g.state == PLAYER_STOPPED || g.song_elapsed < 0 || g.song_duration < 1)
return;
int part = (float) g.song_elapsed / g.song_duration * self->width;
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
x11_bg_attrs (APP_ATTR (ELAPSED)),
self->x,
self->y + self->height / 8,
part,
self->height * 3 / 4);
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
x11_bg_attrs (APP_ATTR (REMAINS)),
self->x + part,
self->y + self->height / 8,
self->width - part,
self->height * 3 / 4);
}
// TODO: Perhaps it should save the number within.
static struct widget *
x11_make_gauge (chtype attrs)
{
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = x11_render_gauge;
w->attrs = attrs;
w->width = -1;
w->height = g.ui_vunit;
return w;
}
static void
x11_render_spectrum (struct widget *self)
{
x11_render_padding (self);
#ifdef WITH_FFTW
XRectangle rectangles[g.spectrum.bars];
int step = self->width / N_ELEMENTS (rectangles);
for (int i = 0; i < g.spectrum.bars; i++)
{
int height = round ((self->height - 2) * g.spectrum.spectrum[i]);
rectangles[i] = (XRectangle)
{
self->x + i * step,
self->y + self->height - 1 - height,
step,
height,
};
}
XRenderFillRectangles (g.dpy, PictOpSrc, g.x11_pixmap_picture,
x11_fg (self), rectangles, N_ELEMENTS (rectangles));
#endif // WITH_FFTW
// Enable the spectrum_redraw() hack.
XRectangle r = { self->x, self->y, self->width, self->height };
XUnionRectWithRegion (&r, g.x11_clip, g.x11_clip);
}
static struct widget *
x11_make_spectrum (chtype attrs, int width)
{
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = x11_render_spectrum;
w->attrs = attrs;
w->width = width * g.ui_vunit / 2;
w->height = g.ui_vunit;
return w;
}
static void
x11_render_scrollbar (struct widget *self)
{
x11_render_padding (self);
struct tab *tab = g.active_tab;
struct scrollbar bar =
app_compute_scrollbar (tab, app_visible_items_height (), g.ui_vunit);
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
x11_fg_attrs (self->attrs),
self->x,
self->y + bar.start,
self->width,
bar.length);
}
static struct widget *
x11_make_scrollbar (chtype attrs)
{
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = x11_render_scrollbar;
w->attrs = attrs;
w->width = g.ui_vunit / 2;
return w;
}
static void
x11_render_list (struct widget *self)
{
// We could do that for all widgets, but it would be kind-of pointless.
XRenderSetPictureClipRectangles (g.dpy, g.x11_pixmap_picture, 0, 0,
&(XRectangle) { self->x, self->y, self->width, self->height }, 1);
x11_render_padding (self);
LIST_FOR_EACH (struct widget, w, self->on_sublayout (self))
{
w->on_render (w);
free (w);
}
XRenderChangePicture (g.dpy, g.x11_pixmap_picture, CPClipMask,
&(XRenderPictureAttributes) { .clip_mask = None });
}
static struct widget *
x11_make_list (void)
{
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = x11_render_list;
w->on_sublayout = app_sublayout_list;
return w;
}
static void
x11_render_editor (struct widget *self)
{
x11_render_padding (self);
XftFont *font = x11_font (self);
XftColor color = { .color = *x11_fg (self) };
// A simplistic adaptation of line_editor_write() follows.
int x = self->x, y = self->y + font->ascent;
XGlyphInfo extents = {};
if (g.editor.prompt)
{
FT_UInt i = XftCharIndex (g.dpy, font, g.editor.prompt);
XftDrawGlyphs (g.xft_draw, &color, font, x, y, &i, 1);
XftGlyphExtents (g.dpy, font, &i, 1, &extents);
x += extents.xOff + g.ui_vunit / 4;
}
// TODO: Make this scroll around the caret, and fade like labels.
XftDrawString32 (g.xft_draw, &color, font, x, y,
g.editor.line, g.editor.len);
XftTextExtents32 (g.dpy, font, g.editor.line, g.editor.point, &extents);
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
&color.color, x + extents.xOff, self->y, 2, self->height);
}
static struct widget *
x11_make_editor (chtype attrs)
{
// TODO: This should ideally measure the text, and copy it to w->text.
struct widget *w = xcalloc (1, sizeof *w + 1);
w->on_render = x11_render_editor;
w->attrs = attrs;
w->width = -1;
w->height = g.ui_vunit;
return w;
}
static void
x11_render (void)
{
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
&x11_default_bg, 0, 0, g.ui_width, g.ui_height);
LIST_FOR_EACH (struct widget, w, g.widgets.head)
if (w->width && w->height)
w->on_render (w);
XRectangle r = { 0, 0, g.ui_width, g.ui_height };
XUnionRectWithRegion (&r, g.x11_clip, g.x11_clip);
poller_idle_set (&g.xpending_event);
}
static void
x11_flip (void)
{
// This exercise in futility doesn't seem to affect CPU usage much.
XRectangle r = {};
XClipBox (g.x11_clip, &r);
XCopyArea (g.dpy, g.x11_pixmap, g.x11_window,
DefaultGC (g.dpy, DefaultScreen (g.dpy)),
r.x, r.y, r.width, r.height, r.x, r.y);
XSubtractRegion (g.x11_clip, g.x11_clip, g.x11_clip);
poller_idle_set (&g.xpending_event);
}
static void
x11_destroy (void)
{
XDestroyIC (g.x11_ic);
XCloseIM (g.x11_im);
XDestroyRegion (g.x11_clip);
XDestroyWindow (g.dpy, g.x11_window);
XRenderFreePicture (g.dpy, g.x11_pixmap_picture);
XFreePixmap (g.dpy, g.x11_pixmap);
XftDrawDestroy (g.xft_draw);
XftFontClose (g.dpy, g.xft_regular);
XftFontClose (g.dpy, g.xft_bold);
cstr_set (&g.x11_selection, NULL);
poller_fd_reset (&g.x11_event);
XCloseDisplay (g.dpy);
// Xft hooks called in XCloseDisplay() don't clean up everything.
FcFini ();
}
static struct ui x11_ui =
{
.padding = x11_make_padding,
.label = x11_make_label,
.button = x11_make_button,
.gauge = x11_make_gauge,
.spectrum = x11_make_spectrum,
.scrollbar = x11_make_scrollbar,
.list = x11_make_list,
.editor = x11_make_editor,
.render = x11_render,
.flip = x11_flip,
.destroy = x11_destroy,
.have_icons = true,
};
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static termo_sym_t
x11_convert_keysym (KeySym keysym)
{
// Leaving out TERMO_TYPE_FUNCTION, TERMO_SYM_DEL (N/A),
// and TERMO_SYM_SPACE (governed by TERMO_FLAG_SPACESYMBOL, not in use).
switch (keysym)
{
case XK_BackSpace: return TERMO_SYM_BACKSPACE;
case XK_Tab: return TERMO_SYM_TAB;
case XK_ISO_Left_Tab: return TERMO_SYM_TAB;
case XK_Return: return TERMO_SYM_ENTER;
case XK_Escape: return TERMO_SYM_ESCAPE;
case XK_Up: return TERMO_SYM_UP;
case XK_Down: return TERMO_SYM_DOWN;
case XK_Left: return TERMO_SYM_LEFT;
case XK_Right: return TERMO_SYM_RIGHT;
case XK_Begin: return TERMO_SYM_BEGIN;
case XK_Find: return TERMO_SYM_FIND;
case XK_Insert: return TERMO_SYM_INSERT;
case XK_Delete: return TERMO_SYM_DELETE;
case XK_Select: return TERMO_SYM_SELECT;
case XK_Page_Up: return TERMO_SYM_PAGEUP;
case XK_Page_Down: return TERMO_SYM_PAGEDOWN;
case XK_Home: return TERMO_SYM_HOME;
case XK_End: return TERMO_SYM_END;
case XK_Cancel: return TERMO_SYM_CANCEL;
case XK_Clear: return TERMO_SYM_CLEAR;
// TERMO_SYM_CLOSE
// TERMO_SYM_COMMAND
// TERMO_SYM_COPY
// TERMO_SYM_EXIT
case XK_Help: return TERMO_SYM_HELP;
// TERMO_SYM_MARK
// TERMO_SYM_MESSAGE
// TERMO_SYM_MOVE
// TERMO_SYM_OPEN
// TERMO_SYM_OPTIONS
case XK_Print: return TERMO_SYM_PRINT;
case XK_Redo: return TERMO_SYM_REDO;
// TERMO_SYM_REFERENCE
// TERMO_SYM_REFRESH
// TERMO_SYM_REPLACE
// TERMO_SYM_RESTART
// TERMO_SYM_RESUME
// TERMO_SYM_SAVE
// TERMO_SYM_SUSPEND
case XK_Undo: return TERMO_SYM_UNDO;
case XK_KP_0: return TERMO_SYM_KP0;
case XK_KP_1: return TERMO_SYM_KP1;
case XK_KP_2: return TERMO_SYM_KP2;
case XK_KP_3: return TERMO_SYM_KP3;
case XK_KP_4: return TERMO_SYM_KP4;
case XK_KP_5: return TERMO_SYM_KP5;
case XK_KP_6: return TERMO_SYM_KP6;
case XK_KP_7: return TERMO_SYM_KP7;
case XK_KP_8: return TERMO_SYM_KP8;
case XK_KP_9: return TERMO_SYM_KP9;
case XK_KP_Enter: return TERMO_SYM_KPENTER;
case XK_KP_Add: return TERMO_SYM_KPPLUS;
case XK_KP_Subtract: return TERMO_SYM_KPMINUS;
case XK_KP_Multiply: return TERMO_SYM_KPMULT;
case XK_KP_Divide: return TERMO_SYM_KPDIV;
case XK_KP_Separator: return TERMO_SYM_KPCOMMA;
case XK_KP_Decimal: return TERMO_SYM_KPPERIOD;
case XK_KP_Equal: return TERMO_SYM_KPEQUALS;
}
return TERMO_SYM_UNKNOWN;
}
static bool
on_x11_keypress (XEvent *e)
{
// A kibibyte long buffer will have to suffice for anyone.
XKeyEvent *ev = &e->xkey;
char buf[1 << 10] = {}, *p = buf;
KeySym keysym = None;
Status status = 0;
int len = Xutf8LookupString
(g.x11_ic, ev, buf, sizeof buf, &keysym, &status);
if (status == XBufferOverflow)
print_warning ("input method overflow");
termo_key_t key = {};
if (ev->state & ShiftMask)
key.modifiers |= TERMO_KEYMOD_SHIFT;
if (ev->state & ControlMask)
key.modifiers |= TERMO_KEYMOD_CTRL;
if (ev->state & Mod1Mask)
key.modifiers |= TERMO_KEYMOD_ALT;
if (keysym >= XK_F1 && keysym <= XK_F35)
{
key.type = TERMO_TYPE_FUNCTION;
key.code.number = 1 + keysym - XK_F1;
return app_process_termo_event (&key);
}
if ((key.code.sym = x11_convert_keysym (keysym)) != TERMO_SYM_UNKNOWN)
{
key.type = TERMO_TYPE_KEYSYM;
return app_process_termo_event (&key);
}
bool result = true;
if (len)
{
key.type = TERMO_TYPE_KEY;
key.modifiers &= ~TERMO_KEYMOD_SHIFT;
int32_t cp = 0;
struct utf8_iter iter = { .s = buf, .len = len };
size_t cp_len = 0;
while ((cp = utf8_iter_next (&iter, &cp_len)) >= 0)
{
termo_key_t k = key;
memcpy (k.multibyte, p, MIN (cp_len, sizeof k.multibyte - 1));
p += cp_len;
// This is all unfortunate, but probably in the right place.
if (!cp)
{
k.code.codepoint = ' ';
if (ev->state & ShiftMask)
k.modifiers |= TERMO_KEYMOD_SHIFT;
}
else if (cp >= 32)
k.code.codepoint = cp;
else if (ev->state & ShiftMask)
k.code.codepoint = cp + 64;
else
k.code.codepoint = cp + 96;
if (!app_process_termo_event (&k))
result = false;
}
}
return result;
}
static void
x11_init_pixmap (void)
{
int screen = DefaultScreen (g.dpy);
g.x11_pixmap = XCreatePixmap (g.dpy, g.x11_window,
g.ui_width, g.ui_height, DefaultDepth (g.dpy, screen));
Visual *visual = DefaultVisual (g.dpy, screen);
XRenderPictFormat *format = XRenderFindVisualFormat (g.dpy, visual);
g.x11_pixmap_picture
= XRenderCreatePicture (g.dpy, g.x11_pixmap, format, 0, NULL);
}
static char *
x11_find_text (struct widget *list, int x, int y)
{
struct widget *target = NULL;
LIST_FOR_EACH (struct widget, w, list)
if (x >= w->x && x < w->x + w->width
&& y >= w->y && y < w->y + w->height)
target = w;
if (!target)
return NULL;
if (target->on_sublayout)
{
struct widget *sublist = target->on_sublayout (target);
char *result = x11_find_text (sublist, x, y);
LIST_FOR_EACH (struct widget, w, sublist)
free (w);
if (result)
return result;
}
return xstrdup (target->text);
}
// TODO: OSC 52 exists for terminals, so make it possible to enable that there.
static bool
x11_process_press (int x, int y, int button, int modifiers)
{
if (button != Button3)
goto out;
char *text = x11_find_text (g.widgets.head, x, y);
if (!text || !*(cstr_strip_in_place (text, " \t")))
{
free (text);
goto out;
}
cstr_set (&g.x11_selection, text);
XSetSelectionOwner (g.dpy, XInternAtom (g.dpy, "CLIPBOARD", False),
g.x11_window, CurrentTime);
app_show_message (xstrdup ("Text copied to clipboard: "),
xstrdup (g.x11_selection));
return true;
out:
return app_process_mouse (TERMO_MOUSE_PRESS, x, y, button, modifiers);
}
static int
x11_state_to_modifiers (unsigned int state)
{
int modifiers = 0;
if (state & ShiftMask) modifiers |= TERMO_KEYMOD_SHIFT;
if (state & ControlMask) modifiers |= TERMO_KEYMOD_CTRL;
if (state & Mod1Mask) modifiers |= TERMO_KEYMOD_ALT;
return modifiers;
}
static bool
on_x11_input_event (XEvent *ev)
{
static XEvent last_press_event;
if (ev->type == KeyPress)
{
last_press_event = (XEvent) {};
return on_x11_keypress (ev);
}
if (ev->type == MotionNotify)
{
return app_process_mouse (TERMO_MOUSE_DRAG,
ev->xmotion.x, ev->xmotion.y, 1 /* Button1MotionMask */,
x11_state_to_modifiers (ev->xmotion.state));
}
// This is nearly the same as tui_on_tty_event().
int x = ev->xbutton.x, y = ev->xbutton.y;
unsigned int button = ev->xbutton.button;
int modifiers = x11_state_to_modifiers (ev->xbutton.state);
if (ev->type == ButtonPress
&& ev->xbutton.time - last_press_event.xbutton.time < 500
&& abs (last_press_event.xbutton.x - x) < 5
&& abs (last_press_event.xbutton.y - y) < 5
&& last_press_event.xbutton.button == button)
{
modifiers |= APP_KEYMOD_DOUBLE_CLICK;
// Prevent interpreting triple clicks as two double clicks.
last_press_event = (XEvent) {};
}
else if (ev->type == ButtonPress)
last_press_event = *ev;
if (ev->type == ButtonPress)
return x11_process_press (x, y, button, modifiers);
if (ev->type == ButtonRelease)
return app_process_mouse
(TERMO_MOUSE_RELEASE, x, y, button, modifiers);
return false;
}
static void
on_x11_selection_request (XSelectionRequestEvent *ev)
{
Atom xa_targets = XInternAtom (g.dpy, "TARGETS", False);
Atom xa_compound_text = XInternAtom (g.dpy, "COMPOUND_TEXT", False);
Atom xa_utf8 = XInternAtom (g.dpy, "UTF8_STRING", False);
Atom targets[] = { xa_targets, XA_STRING, xa_compound_text, xa_utf8 };
XEvent response = {};
bool ok = false;
Atom property = ev->property ? ev->property : ev->target;
if (!g.x11_selection)
goto out;
XICCEncodingStyle style = 0;
if ((ok = ev->target == xa_targets))
{
XChangeProperty (g.dpy, ev->requestor, property,
XA_ATOM, 32, PropModeReplace,
(const unsigned char *) targets, N_ELEMENTS (targets));
goto out;
}
else if (ev->target == XA_STRING)
style = XStringStyle;
else if (ev->target == xa_compound_text)
style = XCompoundTextStyle;
else if (ev->target == xa_utf8)
style = XUTF8StringStyle;
else
goto out;
// XXX: We let it crash us with BadLength, but we may, e.g., use INCR.
XTextProperty text = {};
if ((ok = !Xutf8TextListToTextProperty
(g.dpy, &g.x11_selection, 1, style, &text)))
{
XChangeProperty (g.dpy, ev->requestor, property,
text.encoding, text.format, PropModeReplace,
text.value, text.nitems);
}
XFree (text.value);
out:
response.xselection.type = SelectionNotify;
// XXX: We should check it against the event causing XSetSelectionOwner().
response.xselection.time = ev->time;
response.xselection.requestor = ev->requestor;
response.xselection.selection = ev->selection;
response.xselection.target = ev->target;
response.xselection.property = ok ? property : None;
XSendEvent (g.dpy, ev->requestor, False, 0, &response);
}
static void
on_x11_event (XEvent *ev)
{
termo_key_t key = {};
switch (ev->type)
{
case Expose:
{
XRectangle r = { ev->xexpose.x, ev->xexpose.y,
ev->xexpose.width, ev->xexpose.height };
XUnionRectWithRegion (&r, g.x11_clip, g.x11_clip);
poller_idle_set (&g.flip_event);
break;
}
case ConfigureNotify:
if (g.ui_width == ev->xconfigure.width
&& g.ui_height == ev->xconfigure.height)
break;
g.ui_width = ev->xconfigure.width;
g.ui_height = ev->xconfigure.height;
XRenderFreePicture (g.dpy, g.x11_pixmap_picture);
XFreePixmap (g.dpy, g.x11_pixmap);
x11_init_pixmap ();
XftDrawChange (g.xft_draw, g.x11_pixmap);
app_invalidate ();
break;
case SelectionRequest:
on_x11_selection_request (&ev->xselectionrequest);
break;
case SelectionClear:
cstr_set (&g.x11_selection, NULL);
break;
case UnmapNotify:
app_quit ();
break;
case FocusIn:
key.type = TERMO_TYPE_FOCUS;
key.code.focused = true;
app_process_termo_event (&key);
break;
case FocusOut:
key.type = TERMO_TYPE_FOCUS;
key.code.focused = false;
app_process_termo_event (&key);
break;
case KeyPress:
case ButtonPress:
case ButtonRelease:
case MotionNotify:
if (!on_x11_input_event (ev))
XkbBell (g.dpy, ev->xany.window, 0, None);
}
}
static void
on_x11_pending (void *user_data)
{
(void) user_data;
XkbEvent ev;
while (XPending (g.dpy))
{
if (XNextEvent (g.dpy, &ev.core))
exit_fatal ("XNextEvent returned non-zero");
if (XFilterEvent (&ev.core, None))
continue;
on_x11_event (&ev.core);
}
poller_idle_reset (&g.xpending_event);
}
static void
on_x11_ready (const struct pollfd *pfd, void *user_data)
{
(void) pfd;
on_x11_pending (user_data);
}
static int
on_x11_error (Display *dpy, XErrorEvent *event)
{
// Without opting for WM_DELETE_WINDOW, this window can become destroyed
// and hence invalid at any time. We don't use the Window much,
// so we should be fine ignoring these errors.
if ((event->error_code == BadWindow && event->resourceid == g.x11_window)
|| (event->error_code == BadDrawable && event->resourceid == g.x11_window))
return app_quit (), 0;
// XXX: The simplest possible way of discarding selection management errors.
// XCB would be a small win here, but it is a curse at the same time.
if (event->error_code == BadWindow && event->resourceid != g.x11_window)
return 0;
return x11_default_error_handler (dpy, event);
}
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
static XRenderColor
x11_convert_color (int color)
{
hard_assert (color >= 0 && color <= 255);
static const uint16_t base[16] =
{
0x000, 0x800, 0x080, 0x880, 0x008, 0x808, 0x088, 0xccc,
0x888, 0xf00, 0x0f0, 0xff0, 0x00f, 0xf0f, 0x0ff, 0xfff,
};
XRenderColor c = { .alpha = 0xffff };
if (color < 16)
{
c.red = 0x1111 * (base[color] >> 8);
c.green = 0x1111 * (0xf & (base[color] >> 4));
c.blue = 0x1111 * (0xf & (base[color]));
}
else if (color >= 232)
c.red = c.green = c.blue = 0x0101 * (8 + (color - 232) * 10);
else
{
color -= 16;
int r = color / 36;
int g = (color / 6) % 6;
int b = (color % 6);
c.red = 0x0101 * !!r * (55 + 40 * r);
c.green = 0x0101 * !!g * (55 + 40 * g);
c.blue = 0x0101 * !!b * (55 + 40 * b);
}
return c;
}
static void
x11_init_attributes (void)
{
for (int a = 0; a < ATTRIBUTE_COUNT; a++)
{
g.x_fg[a] = x11_default_fg;
g.x_bg[a] = x11_default_bg;
if (g.attrs[a].fg >= 256 || g.attrs[a].fg < -1
|| g.attrs[a].bg >= 256 || g.attrs[a].bg < -1)
continue;
if (g.attrs[a].fg != -1)
g.x_fg[a] = x11_convert_color (g.attrs[a].fg);
if (g.attrs[a].bg != -1)
g.x_bg[a] = x11_convert_color (g.attrs[a].bg);
g.attrs[a].attrs |= COLOR_PAIR (a + 1);
}
}
static void
x11_init_fonts (void)
{
// TODO: Try to use Gtk/FontName from the _XSETTINGS_S%d selection,
// as well as Net/DoubleClick*. See the XSETTINGS proposal for details.
// https://www.freedesktop.org/wiki/Specifications/XSettingsRegistry/
const char *name = get_config_string (g.config.root, "settings.x11_font");
int screen = DefaultScreen (g.dpy);
FcResult result = 0;
FcPattern *query_regular = FcNameParse ((const FcChar8 *) name);
FcPattern *query_bold = FcPatternDuplicate (query_regular);
FcPatternAdd (query_bold, FC_STYLE,
(FcValue) { .type = FcTypeString, .u.s = (FcChar8 *) "Bold" }, FcFalse);
FcPattern *regular = XftFontMatch (g.dpy, screen, query_regular, &result);
FcPatternDestroy (query_regular);
if (!regular)
exit_fatal ("cannot open font: %s (%d)", name, result);
if (!(g.xft_regular = XftFontOpenPattern (g.dpy, regular)))
{
FcPatternDestroy (regular);
exit_fatal ("cannot open font: %s", name);
}
FcPattern *bold = XftFontMatch (g.dpy, screen, query_bold, &result);
FcPatternDestroy (query_bold);
if (bold && !(g.xft_bold = XftFontOpenPattern (g.dpy, bold)))
FcPatternDestroy (bold);
if (!g.xft_bold)
g.xft_bold = XftFontCopy (g.dpy, g.xft_regular);
}
static void
x11_init (void)
{
// https://tedyin.com/posts/a-brief-intro-to-linux-input-method-framework/
if (!XSupportsLocale ())
print_warning ("locale not supported by Xlib");
XSetLocaleModifiers ("");
if (!(g.dpy = XkbOpenDisplay
(NULL, &g.xkb_base_event_code, NULL, NULL, NULL, NULL)))
exit_fatal ("cannot open display");
if (!XftDefaultHasRender (g.dpy))
exit_fatal ("XRender is not supported");
if (!(g.x11_im = XOpenIM (g.dpy, NULL, NULL, NULL)))
exit_fatal ("failed to open an input method");
x11_default_error_handler = XSetErrorHandler (on_x11_error);
set_cloexec (ConnectionNumber (g.dpy));
g.x11_event = poller_fd_make (&g.poller, ConnectionNumber (g.dpy));
g.x11_event.dispatcher = on_x11_ready;
poller_fd_set (&g.x11_event, POLLIN);
// Whenever something causes Xlib to read its socket, it can make
// the I/O event above fail to trigger for whatever might have ended up
// in its queue. So always use this instead of XSync:
g.xpending_event = poller_idle_make (&g.poller);
g.xpending_event.dispatcher = on_x11_pending;
poller_idle_set (&g.xpending_event);
x11_init_attributes ();
x11_init_fonts ();
int screen = DefaultScreen (g.dpy);
Colormap cmap = DefaultColormap (g.dpy, screen);
XColor default_bg =
{
.red = x11_default_bg.red,
.green = x11_default_bg.green,
.blue = x11_default_bg.blue,
};
if (!XAllocColor (g.dpy, cmap, &default_bg))
exit_fatal ("X11 setup failed");
XSetWindowAttributes attrs =
{
.event_mask = StructureNotifyMask | ExposureMask | FocusChangeMask
| KeyPressMask | ButtonPressMask | ButtonReleaseMask
| Button1MotionMask,
.bit_gravity = NorthWestGravity,
.background_pixel = default_bg.pixel,
};
// Approximate the average width of a character to half of the em unit.
g.ui_vunit = g.xft_regular->height;
g.ui_hunit = g.ui_vunit / 2;
// Base the window's size on the regular font size.
// Roughly trying to match the 80x24 default dimensions of terminals.
g.ui_height = 24 * g.ui_vunit;
g.ui_width = g.ui_height * 4 / 3;
long im_event_mask = 0;
if (!XGetIMValues (g.x11_im, XNFilterEvents, &im_event_mask, NULL))
attrs.event_mask |= im_event_mask;
Visual *visual = DefaultVisual (g.dpy, screen);
g.x11_window = XCreateWindow (g.dpy, RootWindow (g.dpy, screen), 100, 100,
g.ui_width, g.ui_height, 0, CopyFromParent, InputOutput, visual,
CWEventMask | CWBackPixel | CWBitGravity, &attrs);
g.x11_clip = XCreateRegion ();
XTextProperty prop = {};
char *name = PROGRAM_NAME;
if (!Xutf8TextListToTextProperty (g.dpy, &name, 1, XUTF8StringStyle, &prop))
XSetWMName (g.dpy, g.x11_window, &prop);
XFree (prop.value);
// TODO: It is possible to do, e.g., on-the-spot.
XIMStyle im_style = XIMPreeditNothing | XIMStatusNothing;
XIMStyles *im_styles = NULL;
bool im_style_found = false;
if (!XGetIMValues (g.x11_im, XNQueryInputStyle, &im_styles, NULL)
&& im_styles)
{
for (unsigned i = 0; i < im_styles->count_styles; i++)
im_style_found |= im_styles->supported_styles[i] == im_style;
XFree (im_styles);
}
if (!im_style_found)
print_warning ("failed to find the desired input method style");
if (!(g.x11_ic = XCreateIC (g.x11_im,
XNInputStyle, im_style,
XNClientWindow, g.x11_window,
NULL)))
exit_fatal ("failed to open an input context");
XSetICFocus (g.x11_ic);
x11_init_pixmap ();
g.xft_draw = XftDrawCreate (g.dpy, g.x11_pixmap, visual, cmap);
g.ui = &x11_ui;
XMapWindow (g.dpy, g.x11_window);
}
#endif // WITH_X11
// --- Signals -----------------------------------------------------------------
static int g_signal_pipe[2]; ///< A pipe used to signal... signals
/// Program termination has been requested by a signal
static volatile sig_atomic_t g_termination_requested;
/// The window has changed in size
static volatile sig_atomic_t g_winch_received;
static void
signals_postpone_handling (char id)
{
int original_errno = errno;
if (write (g_signal_pipe[1], &id, 1) == -1)
soft_assert (errno == EAGAIN);
errno = original_errno;
}
static void
signals_superhandler (int signum)
{
switch (signum)
{
case SIGWINCH:
g_winch_received = true;
signals_postpone_handling ('w');
break;
case SIGINT:
case SIGTERM:
g_termination_requested = true;
signals_postpone_handling ('t');
break;
default:
hard_assert (!"unhandled signal");
}
}
static void
signals_setup_handlers (void)
{
if (pipe (g_signal_pipe) == -1)
exit_fatal ("%s: %s", "pipe", strerror (errno));
set_cloexec (g_signal_pipe[0]);
set_cloexec (g_signal_pipe[1]);
// So that the pipe cannot overflow; it would make write() block within
// the signal handler, which is something we really don't want to happen.
// The same holds true for read().
set_blocking (g_signal_pipe[0], false);
set_blocking (g_signal_pipe[1], false);
signal (SIGPIPE, SIG_IGN);
struct sigaction sa;
sa.sa_flags = SA_RESTART;
sa.sa_handler = signals_superhandler;
sigemptyset (&sa.sa_mask);
if (sigaction (SIGWINCH, &sa, NULL) == -1
|| sigaction (SIGINT, &sa, NULL) == -1
|| sigaction (SIGTERM, &sa, NULL) == -1)
exit_fatal ("sigaction: %s", strerror (errno));
}
// --- Initialisation, event handling ------------------------------------------
static bool g_verbose_mode = false;
static void
app_on_signal_pipe_readable (const struct pollfd *fd, void *user_data)
{
(void) user_data;
char id = 0;
(void) read (fd->fd, &id, 1);
if (g_termination_requested && !g.quitting)
app_quit ();
// It would be awkward to set up SIGWINCH conditionally,
// so have it as a handler within UIs.
if (g_winch_received)
{
g_winch_received = false;
if (g.ui->winch)
g.ui->winch ();
}
}
static void
app_on_message_timer (void *user_data)
{
(void) user_data;
cstr_set (&g.message, NULL);
cstr_set (&g.message_detail, NULL);
app_invalidate ();
}
static void
app_log_handler (void *user_data, const char *quote, const char *fmt,
va_list ap)
{
// We certainly don't want to end up in a possibly infinite recursion
static bool in_processing;
if (in_processing)
return;
in_processing = true;
struct str message = str_make ();
str_append (&message, quote);
size_t quote_len = message.len;
str_append_vprintf (&message, fmt, ap);
// Show it prettified to the user, then maybe log it elsewhere as well.
message.str[0] = toupper_ascii (message.str[0]);
app_show_message (xstrndup (message.str, quote_len),
xstrdup (message.str + quote_len));
if (g_verbose_mode && (g.ui != &tui_ui || !isatty (STDERR_FILENO)))
fprintf (stderr, "%s\n", message.str);
if (g_debug_tab.active)
debug_tab_push (str_steal (&message),
user_data == NULL ? 0 : g.attrs[(intptr_t) user_data].attrs);
str_free (&message);
in_processing = false;
}
static void
app_init_poller_events (void)
{
g.signal_event = poller_fd_make (&g.poller, g_signal_pipe[0]);
g.signal_event.dispatcher = app_on_signal_pipe_readable;
poller_fd_set (&g.signal_event, POLLIN);
g.message_timer = poller_timer_make (&g.poller);
g.message_timer.dispatcher = app_on_message_timer;
// Always initialized, but only activated with the TUI.
g.tty_event = poller_fd_make (&g.poller, STDIN_FILENO);
g.tty_event.dispatcher = tui_on_tty_readable;
g.tk_timer = poller_timer_make (&g.poller);
g.tk_timer.dispatcher = tui_on_key_timer;
g.connect_event = poller_timer_make (&g.poller);
g.connect_event.dispatcher = app_on_reconnect;
poller_timer_set (&g.connect_event, 0);
g.elapsed_event = poller_timer_make (&g.poller);
g.elapsed_event.dispatcher = g.elapsed_poll
? mpd_on_elapsed_time_tick_poll
: mpd_on_elapsed_time_tick;
g.refresh_event = poller_idle_make (&g.poller);
g.refresh_event.dispatcher = app_on_refresh;
g.flip_event = poller_idle_make (&g.poller);
g.flip_event.dispatcher = app_on_flip;
}
static void
app_init_enqueue (char *argv[], int argc)
{
// TODO: MPD is unwilling to play directories, so perhaps recurse ourselves
char cwd[4096] = "";
for (int i = 0; i < argc; i++)
{
// This is a super-trivial method of URL detection, however anything
// contaning the scheme and authority delimiters in a sequence is most
// certainly not a filesystem path, and thus it will work as expected.
// Error handling may be done by MPD.
const char *path_or_URL = argv[i];
if (*path_or_URL == '/' || strstr (path_or_URL, "://"))
strv_append (&g.enqueue, path_or_URL);
else if (!*cwd && !getcwd (cwd, sizeof cwd))
exit_fatal ("getcwd: %s", strerror (errno));
else
strv_append_owned (&g.enqueue,
xstrdup_printf ("%s/%s", cwd, path_or_URL));
}
}
int
main (int argc, char *argv[])
{
static const struct opt opts[] =
{
{ 'd', "debug", NULL, 0, "run in debug mode" },
#ifdef WITH_X11
{ 'x', "x11", NULL, 0, "use X11 even when run from a terminal" },
#endif // WITH_X11
{ 'h', "help", NULL, 0, "display this help and exit" },
{ 'v', "verbose", NULL, 0, "log messages on standard error" },
{ 'V', "version", NULL, 0, "output version information and exit" },
{ 0, NULL, NULL, 0, NULL }
};
bool requested_x11 = false;
struct opt_handler oh
= opt_handler_make (argc, argv, opts, "[URL | PATH]...", "MPD client.");
int c;
while ((c = opt_handler_get (&oh)) != -1)
switch (c)
{
case 'd':
g_debug_mode = true;
break;
case 'x':
requested_x11 = true;
break;
case 'v':
g_verbose_mode = true;
break;
case 'h':
opt_handler_usage (&oh, stdout);
exit (EXIT_SUCCESS);
case 'V':
printf (PROGRAM_NAME " " PROGRAM_VERSION "\n");
exit (EXIT_SUCCESS);
default:
print_error ("wrong options");
opt_handler_usage (&oh, stderr);
exit (EXIT_FAILURE);
}
argc -= optind;
argv += optind;
opt_handler_free (&oh);
// We only need to convert to and from the terminal encoding
if (!setlocale (LC_CTYPE, ""))
print_warning ("failed to set the locale");
app_init_context ();
app_init_enqueue (argv, argc);
app_load_configuration ();
signals_setup_handlers ();
app_init_poller_events ();
#ifdef WITH_X11
if (requested_x11 || (!isatty (STDIN_FILENO) && getenv ("DISPLAY")))
x11_init ();
else
#endif // WITH_X11
tui_init ();
g_normal_keys = app_init_bindings ("normal",
g_normal_defaults, N_ELEMENTS (g_normal_defaults), &g_normal_keys_len);
g_editor_keys = app_init_bindings ("editor",
g_editor_defaults, N_ELEMENTS (g_editor_defaults), &g_editor_keys_len);
if (g_debug_mode)
app_prepend_tab (debug_tab_init ());
// Redirect all messages from liberty to a special tab so they're not lost
g_log_message_real = app_log_handler;
app_prepend_tab (info_tab_init ());
if (g.streams.len)
app_prepend_tab (streams_tab_init ());
app_prepend_tab (library_tab_init ());
app_prepend_tab (current_tab_init ());
app_switch_tab ((g.help_tab = help_tab_init ()));
// TODO: the help tab should be the default for new users only,
// so provide a configuration option to flip this
if (argc)
app_switch_tab (&g_current_tab);
g.polling = true;
while (g.polling)
poller_run (&g.poller);
g.ui->destroy ();
g_log_message_real = log_message_stdio;
app_free_context ();
return 0;
}
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