/* * nncmpp -- the MPD client you never knew you needed * * Copyright (c) 2016 - 2021, Přemysl Eric Janouch * * 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 #include #include #include // 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 // 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 #endif // WITH_FFTW // Remote MPD control needs appropriate volume controls. #ifdef WITH_PULSE #include "liberty/liberty-pulse.c" #include #include #include #include #include #endif // WITH_PULSE #define APP_TITLE PROGRAM_NAME ///< Left top corner // --- Utilities --------------------------------------------------------------- // The standard endwin/refresh sequence makes the terminal flicker static void update_curses_terminal_size (void) { #if defined HAVE_RESIZETERM && defined TIOCGWINSZ struct winsize size; if (!ioctl (STDOUT_FILENO, TIOCGWINSZ, (char *) &size)) { char *row = getenv ("LINES"); char *col = getenv ("COLUMNS"); unsigned long tmp; resizeterm ( (row && xstrtoul (&tmp, row, 10)) ? tmp : size.ws_row, (col && xstrtoul (&tmp, col, 10)) ? tmp : size.ws_col); } #else // HAVE_RESIZETERM && TIOCGWINSZ endwin (); refresh (); #endif // HAVE_RESIZETERM && TIOCGWINSZ } static int64_t clock_msec (clockid_t clock) { struct timespec tp; hard_assert (clock_gettime (clock, &tp) != -1); return (int64_t) tp.tv_sec * 1000 + (int64_t) tp.tv_nsec / 1000000; } static bool xstrtoul_map (const struct str_map *map, const char *key, unsigned long *out) { const char *field = str_map_find (map, key); return field && xstrtoul (out, field, 10); } static const char * xbasename (const char *path) { const char *last_slash = strrchr (path, '/'); return last_slash ? last_slash + 1 : path; } static char *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 *spectrum; ///< String buffer for the "render" 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->spectrum; 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: 9 * 7 = 63 dB of range. int height = N_ELEMENTS (spectrum_bars) - 1 + (int) (db / 7); p += strlen (strcpy (p, spectrum_bars[MAX (height, 0)])); } } static bool spectrum_init (struct spectrum *s, char *format, int bars, 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->spectrum = xcalloc (sizeof *s->spectrum, s->bars * 3 + 1); 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); } // Limit updates to 30 times per second to limit CPU load s->samples = s->sampling_rate / s->bins * 2 / 30; 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); 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're not using any TUI framework (which are mostly a lost cause to me // in the post-Unicode era and not worth pursuing), and the code would get // bloated and incomprehensible fast. We mostly rely on "row_buffer" to write // text from left to right row after row while keeping track of cells. // // There is an independent top pane displaying general status information, // followed by a tab bar and a listview served by a per-tab event handler. // // For simplicity, the listview can only work with items that are one row high. struct tab; enum action; /// Try to handle an action in the tab typedef bool (*tab_action_fn) (enum action action); /// Draw an item to the screen using the row buffer API typedef void (*tab_item_draw_fn) (size_t item_index, struct row_buffer *buffer, int width); struct tab { LIST_HEADER (struct tab) char *name; ///< Visible identifier size_t name_width; ///< Visible width of the name char *header; ///< The header, should there be any // Implementation: tab_action_fn on_action; ///< User action handler callback tab_item_draw_fn on_item_draw; ///< Item draw callback // Provided by tab owner: bool can_multiselect; ///< Multiple items can be selected size_t item_count; ///< Total item count // Managed by the common handler: int item_top; ///< Index of the topmost item int item_selected; ///< Index of the selected item int item_mark; ///< Multiselect second point index }; // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - enum player_state { PLAYER_STOPPED, PLAYER_PLAYING, PLAYER_PAUSED }; // Basically a container for most of the globals; no big sense in handing // around a pointer to this, hence it is a simple global variable as well. // There is enough global state as it is. static struct app_context { // Event loop: struct poller poller; ///< Poller 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 // 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? // TODO: initialize these to -1 int song; ///< Current song index int song_elapsed; ///< Song elapsed in seconds int song_duration; ///< Song duration in seconds int volume; ///< Current volume struct item_list playlist; ///< Current playlist uint32_t playlist_version; ///< Playlist version int playlist_time; ///< Play time in seconds // Data: struct config config; ///< Program configuration struct strv streams; ///< List of "name NUL URI NUL" struct 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 // Emulated widgets: int header_height; ///< Height of the header int tabs_offset; ///< Offset to tabs or -1 int controls_offset; ///< Offset to player controls or -1 int gauge_offset; ///< Offset to the gauge or -1 int gauge_width; ///< Width of the gauge, if present #ifdef WITH_FFTW struct spectrum spectrum; ///< Spectrum analyser int spectrum_fd; ///< FIFO file descriptor (non-blocking) int spectrum_column, spectrum_row; ///< Position for fast refresh 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 struct line_editor editor; ///< Line editor struct poller_idle refresh_event; ///< Refresh the screen // Terminal: termo_t *tk; ///< termo handle struct poller_timer tk_timer; ///< termo timeout timer bool locale_is_utf8; ///< The locale is Unicode bool use_partial_boxes; ///< Use Unicode box drawing chars bool focused; ///< Whether the terminal has focus struct attrs attrs[ATTRIBUTE_COUNT]; } g; /// Shortcut to retrieve named terminal attributes #define APP_ATTR(name) g.attrs[ATTRIBUTE_ ## name].attrs // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static void tab_init (struct tab *self, const char *name) { memset (self, 0, sizeof *self); // Add some padding for decorative purposes self->name = xstrdup_printf (" %s ", name); // Assuming tab names are pure ASCII, otherwise this would be inaccurate // and we'd need to filter it first to replace invalid chars with '?' self->name_width = u8_strwidth ((uint8_t *) self->name, locale_charset ()); self->item_selected = 0; self->item_mark = -1; } static void tab_free (struct tab *self) { free (self->name); } static struct tab_range { int from, upto; } tab_selection_range (struct tab *self) { if (self->item_selected < 0 || !self->item_count) return (struct tab_range) { -1, -1 }; if (self->item_mark < 0) return (struct tab_range) { self->item_selected, self->item_selected }; return (struct tab_range) { MIN (self->item_selected, self->item_mark), MAX (self->item_selected, self->item_mark) }; } // --- Configuration ----------------------------------------------------------- static 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" }, #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 // 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.config = config_make (); g.streams = strv_make (); g.enqueue = strv_make (); g.playlist = item_list_make (); g.playback_info = str_map_make (free); g.playback_info.key_xfrm = tolower_ascii_strxfrm; #ifdef WITH_FFTW g.spectrum_fd = -1; g.spectrum_row = g.spectrum_column = -1; #endif // WITH_FFTW #ifdef WITH_PULSE pulse_init (&g.pulse, NULL); #endif // WITH_PULSE // 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.focused = true; app_init_attributes (); } static void app_init_terminal (void) { TERMO_CHECK_VERSION; if (!(g.tk = termo_new (STDIN_FILENO, NULL, 0))) exit_fatal ("failed to set up the terminal"); if (!initscr () || nonl () == ERR) exit_fatal ("failed to set up the terminal"); // 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); } } 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); if (g.tk) termo_destroy (g.tk); } static void app_quit (void) { g.quitting = true; // So far there's nothing for us to wait on, so let's just stop looping; // otherwise we might want to e.g. cleanly bring down the MPD interface g.polling = false; } static bool app_is_character_in_locale (ucs4_t ch) { // Avoid the overhead joined with calling iconv() for all characters. if (g.locale_is_utf8) return true; // The library really creates a new conversion object every single time // and doesn't provide any smarter APIs. Luckily, most users use UTF-8. size_t len; char *tmp = u32_conv_to_encoding (locale_charset (), iconveh_error, &ch, 1, NULL, NULL, &len); if (!tmp) return false; free (tmp); return true; } // --- Rendering --------------------------------------------------------------- static void app_invalidate (void) { poller_idle_set (&g.refresh_event); } static void app_flush_buffer (struct row_buffer *buf, int width, chtype attrs) { row_buffer_align (buf, width, attrs); row_buffer_flush (buf); row_buffer_free (buf); } /// Write the given UTF-8 string padded with spaces. /// @param[in] attrs Text attributes for the text, including padding. static void app_write_line (const char *str, chtype attrs) { struct row_buffer buf = row_buffer_make (); row_buffer_append (&buf, str, attrs); app_flush_buffer (&buf, COLS, attrs); } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static void app_flush_header (struct row_buffer *buf, chtype attrs) { move (g.header_height++, 0); app_flush_buffer (buf, COLS, attrs); } static void app_draw_song_info (void) { compact_map_t map; if (!(map = item_list_get (&g.playlist, g.song))) return; chtype attr_normal = APP_ATTR (NORMAL); chtype attr_highlight = APP_ATTR (HIGHLIGHT); char *title; if ((title = compact_map_find (map, "title")) || (title = compact_map_find (map, "name")) || (title = compact_map_find (map, "file"))) { struct row_buffer buf = row_buffer_make (); row_buffer_append (&buf, title, attr_highlight); app_flush_header (&buf, attr_normal); } char *artist = compact_map_find (map, "artist"); char *album = compact_map_find (map, "album"); if (!artist && !album) return; struct row_buffer buf = row_buffer_make (); if (artist) row_buffer_append_args (&buf, " by " + !buf.total_width, attr_normal, artist, attr_highlight, NULL); if (album) row_buffer_append_args (&buf, " from " + !buf.total_width, attr_normal, album, attr_highlight, NULL); app_flush_header (&buf, attr_normal); } static char * app_time_string (int seconds) { int minutes = seconds / 60; seconds %= 60; int hours = minutes / 60; minutes %= 60; struct str s = str_make (); if (hours) str_append_printf (&s, "%d:%02d:", hours, minutes); else str_append_printf (&s, "%d:", minutes); str_append_printf (&s, "%02d", seconds); return str_steal (&s); } static void app_write_time (struct row_buffer *buf, int seconds, chtype attrs) { char *s = app_time_string (seconds); row_buffer_append (buf, s, attrs); free (s); } static void app_write_gauge (struct row_buffer *buf, float ratio, int width) { if (ratio < 0) ratio = 0; if (ratio > 1) ratio = 1; // Always compute it in exactly eight times the resolution, // because sometimes Unicode is even useful int len_left = ratio * width * 8 + 0.5; static const char *partials[] = { " ", "▏", "▎", "▍", "▌", "▋", "▊", "▉" }; int remainder = len_left % 8; len_left /= 8; const char *partial = NULL; if (g.use_partial_boxes) partial = partials[remainder]; else len_left += remainder >= (int) 4; int len_right = width - len_left; row_buffer_space (buf, len_left, APP_ATTR (ELAPSED)); if (partial && len_right-- > 0) row_buffer_append (buf, partial, APP_ATTR (REMAINS)); row_buffer_space (buf, len_right, APP_ATTR (REMAINS)); } static void app_draw_status (void) { if (g.state != PLAYER_STOPPED) app_draw_song_info (); chtype attr_normal = APP_ATTR (NORMAL); chtype attr_highlight = APP_ATTR (HIGHLIGHT); struct row_buffer buf = row_buffer_make (); bool stopped = g.state == PLAYER_STOPPED; chtype attr_song_action = stopped ? attr_normal : attr_highlight; const char *toggle = g.state == PLAYER_PLAYING ? "||" : "|>"; row_buffer_append_args (&buf, "<<", attr_song_action, " ", attr_normal, toggle, attr_highlight, " ", attr_normal, "[]", attr_song_action, " ", attr_normal, ">>", attr_song_action, " ", attr_normal, NULL); if (stopped) row_buffer_append (&buf, "Stopped", attr_normal); else { if (g.song_elapsed >= 0) { app_write_time (&buf, g.song_elapsed, attr_normal); row_buffer_append (&buf, " ", attr_normal); } if (g.song_duration >= 1) { row_buffer_append (&buf, "/ ", attr_normal); app_write_time (&buf, g.song_duration, attr_normal); row_buffer_append (&buf, " ", attr_normal); } row_buffer_append (&buf, " ", attr_normal); } // It gets a bit complicated due to the only right-aligned item on the row struct str volume = str_make (); #ifdef WITH_PULSE if (g.pulse_control_requested) { struct str buf = str_make (); if (pulse_volume_status (&g.pulse, &buf)) { if (g.volume >= 0 && g.volume != 100) str_append_printf (&buf, " (%d%%)", g.volume); } else { if (g.volume >= 0) str_append_printf (&buf, "(%d%%)", g.volume); } if (buf.len) str_append_printf (&volume, " %s", buf.str); str_free (&buf); } else #endif // WITH_PULSE if (g.volume >= 0) str_append_printf (&volume, " %3d%%", g.volume); int remaining = COLS - buf.total_width - volume.len; if (!stopped && g.song_elapsed >= 0 && g.song_duration >= 1 && remaining > 0) { g.gauge_offset = buf.total_width; g.gauge_width = remaining; app_write_gauge (&buf, (float) g.song_elapsed / g.song_duration, remaining); } else row_buffer_space (&buf, remaining, attr_normal); if (volume.len) row_buffer_append (&buf, volume.str, attr_normal); str_free (&volume); g.controls_offset = g.header_height; app_flush_header (&buf, attr_normal); } static void app_draw_header (void) { g.header_height = 0; g.tabs_offset = -1; g.controls_offset = -1; g.gauge_offset = -1; g.gauge_width = 0; switch (g.client.state) { case MPD_CONNECTED: app_draw_status (); break; case MPD_CONNECTING: move (g.header_height++, 0); app_write_line ("Connecting to MPD...", APP_ATTR (NORMAL)); break; case MPD_DISCONNECTED: move (g.header_height++, 0); app_write_line ("Disconnected", APP_ATTR (NORMAL)); } chtype attrs[2] = { APP_ATTR (TAB_BAR), APP_ATTR (TAB_ACTIVE) }; // The help tab is disguised so that it's not too intruding struct row_buffer buf = row_buffer_make (); row_buffer_append (&buf, APP_TITLE, attrs[g.active_tab == g.help_tab]); row_buffer_append (&buf, " ", attrs[false]); g.tabs_offset = g.header_height; LIST_FOR_EACH (struct tab, iter, g.tabs) row_buffer_append (&buf, iter->name, attrs[iter == g.active_tab]); #ifdef WITH_FFTW // This seems like the most reasonable, otherwise unoccupied space if (g.spectrum_fd != -1) { // Find some space and remember where it was, for fast refreshes row_buffer_ellipsis (&buf, COLS - g.spectrum.bars - 1); row_buffer_align (&buf, COLS - g.spectrum.bars, attrs[false]); g.spectrum_row = g.header_height; g.spectrum_column = buf.total_width; row_buffer_append (&buf, g.spectrum.spectrum, attrs[false]); } #endif // WITH_FFTW app_flush_header (&buf, attrs[false]); const char *header = g.active_tab->header; if (header) { buf = row_buffer_make (); row_buffer_append (&buf, header, APP_ATTR (HEADER)); app_flush_header (&buf, APP_ATTR (HEADER)); } } static int app_fitting_items (void) { // The raw number of items that would have fit on the terminal return LINES - g.header_height - 1 /* status bar */; } static int app_visible_items (void) { return MAX (0, app_fitting_items ()); } /// Figure out scrollbar appearance. @a s is the minimal slider length as well /// as the scrollbar resolution per @a visible item. struct scrollbar { long length, start; } app_compute_scrollbar (struct tab *tab, long visible, long s) { long top = tab->item_top, total = tab->item_count; if (total < visible) return (struct scrollbar) { 0, 0 }; if (visible == 1) return (struct scrollbar) { s, 0 }; if (visible == 2) return (struct scrollbar) { s, top >= total / 2 ? s : 0 }; // Only be at the top or bottom when the top or bottom item can be seen. // The algorithm isn't optimal but it's a bitch to get right. double available_length = s * visible - 2 - s + 1; double lenf = s + available_length * visible / total, length = 0.; long offset = 1 + available_length * top / total + modf (lenf, &length); if (top == 0) return (struct scrollbar) { length, 0 }; if (top + visible >= total) return (struct scrollbar) { length, s * visible - length }; return (struct scrollbar) { length, offset }; } static void app_draw_scrollbar (void) { // This assumes that we can write to the one-before-last column, // i.e. that it's not covered by any double-wide character (and that // ncurses comes to the right results when counting characters). // // We could also precompute the scrollbar and append it to each row // as we render them, plus all the unoccupied rows. struct tab *tab = g.active_tab; int visible_items = app_visible_items (); hard_assert (tab->item_count != 0); if (!g.use_partial_boxes) { struct scrollbar bar = app_compute_scrollbar (tab, visible_items, 1); for (int row = 0; row < visible_items; row++) { move (g.header_height + row, COLS - 1); if (row < bar.start || row >= bar.start + bar.length) addch (' ' | APP_ATTR (SCROLLBAR)); else addch (' ' | APP_ATTR (SCROLLBAR) | A_REVERSE); } return; } struct scrollbar bar = app_compute_scrollbar (tab, visible_items, 8); bar.length += bar.start; int start_part = bar.start % 8; bar.start /= 8; int end_part = bar.length % 8; bar.length /= 8; // Even with this, the solid part must be at least one character high static const char *partials[] = { "█", "▇", "▆", "▅", "▄", "▃", "▂", "▁" }; for (int row = 0; row < visible_items; row++) { chtype attrs = APP_ATTR (SCROLLBAR); if (row > bar.start && row <= bar.length) attrs ^= A_REVERSE; const char *c = " "; if (row == bar.start) c = partials[start_part]; if (row == bar.length) c = partials[end_part]; move (g.header_height + row, COLS - 1); struct row_buffer buf = row_buffer_make (); row_buffer_append (&buf, c, attrs); row_buffer_flush (&buf); row_buffer_free (&buf); } } static void app_draw_view (void) { move (g.header_height, 0); clrtobot (); struct tab *tab = g.active_tab; bool want_scrollbar = (int) tab->item_count > app_visible_items (); int view_width = COLS - want_scrollbar; int to_show = MIN (app_fitting_items (), (int) tab->item_count - tab->item_top); for (int row = 0; row < to_show; row++) { int item_index = tab->item_top + row; int row_attrs = (item_index & 1) ? APP_ATTR (ODD) : APP_ATTR (EVEN); bool override_colors = true; if (item_index == tab->item_selected) row_attrs = g.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.focused ? APP_ATTR (MULTISELECT) : APP_ATTR (DEFOCUSED); else override_colors = false; struct row_buffer buf = row_buffer_make (); tab->on_item_draw (item_index, &buf, view_width); // Combine attributes used by the handler with the defaults. // Avoiding attrset() because of row_buffer_flush(). for (size_t i = 0; i < buf.chars_len; i++) { chtype *attrs = &buf.chars[i].attrs; if (override_colors) *attrs = (*attrs & ~(A_COLOR | A_REVERSE)) | row_attrs; else if ((*attrs & A_COLOR) && (row_attrs & A_COLOR)) *attrs |= (row_attrs & ~A_COLOR); else *attrs |= row_attrs; } move (g.header_height + row, 0); app_flush_buffer (&buf, view_width, row_attrs); } if (want_scrollbar) app_draw_scrollbar (); } static void app_write_mpd_status_playlist (struct row_buffer *buf) { struct str stats = str_make (); if (g.playlist.len == 1) str_append_printf (&stats, "1 song "); else str_append_printf (&stats, "%zu songs ", g.playlist.len); int hours = g.playlist_time / 3600; int minutes = g.playlist_time % 3600 / 60; if (hours || minutes) { str_append_c (&stats, ' '); if (hours == 1) str_append_printf (&stats, " 1 hour"); else if (hours) str_append_printf (&stats, " %d hours", hours); if (minutes == 1) str_append_printf (&stats, " 1 minute"); else if (minutes) str_append_printf (&stats, " %d minutes", minutes); } row_buffer_append (buf, stats.str, APP_ATTR (NORMAL)); str_free (&stats); } static void app_write_mpd_status (struct row_buffer *buf) { struct str_map *map = &g.playback_info; if (g.active_tab->item_mark > -1) { struct tab_range r = tab_selection_range (g.active_tab); char *msg = xstrdup_printf (r.from == r.upto ? "Selected %d item" : "Selected %d items", r.upto - r.from + 1); row_buffer_append (buf, msg, APP_ATTR (HIGHLIGHT)); free (msg); } else if (g.poller_curl.registered) row_buffer_append (buf, "Downloading...", APP_ATTR (NORMAL)); else if (str_map_find (map, "updating_db")) row_buffer_append (buf, "Updating database...", APP_ATTR (NORMAL)); else app_write_mpd_status_playlist (buf); const char *s; bool repeat = (s = str_map_find (map, "repeat")) && strcmp (s, "0"); bool random = (s = str_map_find (map, "random")) && strcmp (s, "0"); bool single = (s = str_map_find (map, "single")) && strcmp (s, "0"); bool consume = (s = str_map_find (map, "consume")) && strcmp (s, "0"); struct row_buffer right = row_buffer_make (); chtype a[2] = { APP_ATTR (NORMAL), APP_ATTR (HIGHLIGHT) }; if (repeat) row_buffer_append_args (&right, " ", APP_ATTR (NORMAL), "repeat", a[repeat], NULL); if (random) row_buffer_append_args (&right, " ", APP_ATTR (NORMAL), "random", a[random], NULL); if (single) row_buffer_append_args (&right, " ", APP_ATTR (NORMAL), "single", a[single], NULL); if (consume) row_buffer_append_args (&right, " ", APP_ATTR (NORMAL), "consume", a[consume], NULL); row_buffer_space (buf, MAX (0, COLS - buf->total_width - right.total_width), APP_ATTR (NORMAL)); row_buffer_append_buffer (buf, &right); row_buffer_free (&right); } static void app_draw_statusbar (void) { int caret = -1; struct row_buffer buf = row_buffer_make (); if (g.message) row_buffer_append (&buf, g.message, APP_ATTR (HIGHLIGHT)); else if (g.editor.line) caret = line_editor_write (&g.editor, &buf, COLS, APP_ATTR (HIGHLIGHT)); else if (g.client.state == MPD_CONNECTED) app_write_mpd_status (&buf); move (LINES - 1, 0); app_flush_buffer (&buf, COLS, APP_ATTR (NORMAL)); curs_set (0); if (caret != -1) { move (LINES - 1, caret); curs_set (1); } } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - /// Checks what items are visible and returns if the range was alright static bool app_fix_view_range (void) { struct tab *tab = g.active_tab; if (tab->item_top < 0) { tab->item_top = 0; return false; } // If the contents are at least as long as the screen, always fill it int max_item_top = (int) tab->item_count - app_visible_items (); // But don't let that suggest a negative offset max_item_top = MAX (max_item_top, 0); if (tab->item_top > max_item_top) { tab->item_top = max_item_top; return false; } return true; } static void app_on_refresh (void *user_data) { (void) user_data; poller_idle_reset (&g.refresh_event); app_draw_header (); app_fix_view_range(); app_draw_view (); app_draw_statusbar (); refresh (); } // --- Actions ----------------------------------------------------------------- /// Scroll down (positive) or up (negative) @a n items static bool app_scroll (int n) { g.active_tab->item_top += n; app_invalidate (); return app_fix_view_range (); } static void app_ensure_selection_visible (void) { struct tab *tab = g.active_tab; if (tab->item_selected < 0 || !tab->item_count) return; int too_high = tab->item_top - tab->item_selected; if (too_high > 0) app_scroll (-too_high); int too_low = tab->item_selected - (tab->item_top + app_visible_items () - 1); if (too_low > 0) app_scroll (too_low); } static bool app_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_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 ----------------------------------------------------------------- #include "nncmpp-actions.h" 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 struct row_buffer *row) { // XXX: this is slow and simplistic, but unistring is awkward to use size_t best = 0; for (size_t start = 0; start < row->chars_len; start++) { size_t i = 0; for (; i < len && start + i < row->chars_len; i++) if (uc_tolower (needle[i]) != uc_tolower (row->chars[start + i].c)) 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 row_buffer buf = row_buffer_make (); tab->on_item_draw (index, &buf, COLS); current = incremental_search_match (g.editor.line, g.editor.len, &buf); row_buffer_free (&buf); 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 (); return true; default: return false; case ACTION_MULTISELECT: if (!tab->can_multiselect || !tab->item_count || tab->item_selected < 0) return false; app_invalidate (); if (tab->item_mark > -1) tab->item_mark = -1; else tab->item_mark = tab->item_selected; return true; case ACTION_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 (); 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: return false; case ACTION_EDITOR_B_CHAR: return line_editor_action (&g.editor, LINE_EDITOR_B_CHAR); case ACTION_EDITOR_F_CHAR: return line_editor_action (&g.editor, LINE_EDITOR_F_CHAR); case ACTION_EDITOR_B_WORD: return line_editor_action (&g.editor, LINE_EDITOR_B_WORD); case ACTION_EDITOR_F_WORD: return line_editor_action (&g.editor, LINE_EDITOR_F_WORD); case ACTION_EDITOR_HOME: return line_editor_action (&g.editor, LINE_EDITOR_HOME); case ACTION_EDITOR_END: return line_editor_action (&g.editor, LINE_EDITOR_END); case ACTION_EDITOR_B_DELETE: return line_editor_action (&g.editor, LINE_EDITOR_B_DELETE); case ACTION_EDITOR_F_DELETE: return line_editor_action (&g.editor, LINE_EDITOR_F_DELETE); case ACTION_EDITOR_B_KILL_WORD: return line_editor_action (&g.editor, LINE_EDITOR_B_KILL_WORD); case ACTION_EDITOR_B_KILL_LINE: return line_editor_action (&g.editor, LINE_EDITOR_B_KILL_LINE); case ACTION_EDITOR_F_KILL_LINE: return line_editor_action (&g.editor, LINE_EDITOR_F_KILL_LINE); } } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static bool app_process_left_mouse_click (int line, int column, bool double_click) { if (line == g.controls_offset) { // XXX: there could be a push_widget(buf, text, attrs, handler) // function to help with this but it might not be worth it enum action action = ACTION_NONE; if (column >= 0 && column <= 1) action = ACTION_MPD_PREVIOUS; if (column >= 3 && column <= 4) action = ACTION_MPD_TOGGLE; if (column >= 6 && column <= 7) action = ACTION_MPD_STOP; if (column >= 9 && column <= 10) action = ACTION_MPD_NEXT; if (action) return app_process_action (action); int gauge_offset = column - g.gauge_offset; if (g.gauge_offset < 0 || gauge_offset < 0 || gauge_offset >= g.gauge_width) return false; float position = (float) gauge_offset / g.gauge_width; if (g.song_duration >= 1) { char *where = xstrdup_printf ("%f", position * g.song_duration); MPD_SIMPLE ("seekcur", where); free (where); } } else if (line == g.tabs_offset) { struct tab *winner = NULL; int indent = strlen (APP_TITLE); if (column < indent) { app_switch_tab (g.help_tab); return true; } for (struct tab *iter = g.tabs; !winner && iter; iter = iter->next) { if (column < (indent += iter->name_width)) winner = iter; } if (!winner) return false; app_switch_tab (winner); } else if (line >= g.header_height) { struct tab *tab = g.active_tab; int row_index = line - g.header_height; if (row_index < 0 || row_index >= (int) tab->item_count - tab->item_top) return false; // TODO: handle the scrollbar a bit better than this int visible_items = app_visible_items (); if ((int) tab->item_count > visible_items && column == COLS - 1) tab->item_top = (float) row_index / visible_items * (int) tab->item_count - visible_items / 2; else tab->item_selected = row_index + tab->item_top; app_invalidate (); if (double_click) app_process_action (ACTION_CHOOSE); } return true; } static bool app_process_mouse (termo_mouse_event_t type, int line, int column, int button, bool double_click) { if (type != TERMO_MOUSE_PRESS) return true; if (g.editor.line) line_editor_abort (&g.editor, false); if (button == 1) return app_process_left_mouse_click (line, column, double_click); else if (button == 4) return app_process_action (ACTION_SCROLL_UP); else if (button == 5) return app_process_action (ACTION_SCROLL_DOWN); return false; } // - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - static struct binding { termo_key_t decoded; ///< Decoded key definition enum action action; ///< Action to take int order; ///< Order for stable sorting } *g_normal_keys, *g_editor_keys; static size_t g_normal_keys_len, g_editor_keys_len; static struct binding_default { const char *key; ///< Key definition enum action action; ///< Action to take } g_normal_defaults[] = { { "Escape", ACTION_QUIT }, { "q", ACTION_QUIT }, { "C-l", ACTION_REDRAW }, { "M-Tab", ACTION_TAB_LAST }, { "F1", ACTION_TAB_HELP }, { "C-Left", ACTION_TAB_PREVIOUS }, { "C-Right", ACTION_TAB_NEXT }, { "C-PageUp", ACTION_TAB_PREVIOUS }, { "C-PageDown", ACTION_TAB_NEXT }, { "Home", ACTION_GOTO_TOP }, { "End", ACTION_GOTO_BOTTOM }, { "M-<", ACTION_GOTO_TOP }, { "M->", ACTION_GOTO_BOTTOM }, { "g", ACTION_GOTO_TOP }, { "G", ACTION_GOTO_BOTTOM }, { "S-Up", ACTION_MOVE_UP }, { "S-Down", ACTION_MOVE_DOWN }, { "Up", ACTION_GOTO_ITEM_PREVIOUS }, { "Down", ACTION_GOTO_ITEM_NEXT }, { "k", ACTION_GOTO_ITEM_PREVIOUS }, { "j", ACTION_GOTO_ITEM_NEXT }, { "PageUp", ACTION_GOTO_PAGE_PREVIOUS }, { "PageDown", ACTION_GOTO_PAGE_NEXT }, { "C-p", ACTION_GOTO_ITEM_PREVIOUS }, { "C-n", ACTION_GOTO_ITEM_NEXT }, { "C-b", ACTION_GOTO_PAGE_PREVIOUS }, { "C-f", ACTION_GOTO_PAGE_NEXT }, { "C-y", ACTION_SCROLL_UP }, { "C-e", ACTION_SCROLL_DOWN }, { "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 }, { "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 bool app_process_termo_event (termo_key_t *event) { bool handled = false; if ((handled = event->type == TERMO_TYPE_FOCUS)) { g.focused = !!event->code.focused; app_invalidate (); // Senseless fall-through } struct binding dummy = { *event, 0, 0 }, *binding; if (g.editor.line) { if ((binding = bsearch (&dummy, g_editor_keys, g_editor_keys_len, sizeof *binding, app_binding_cmp))) return app_editor_process_action (binding->action); if (event->type != TERMO_TYPE_KEY || event->modifiers != 0) return 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; #define DURATION_MAX_LEN (1 /*separator */ + 2 /* h */ + 3 /* m */+ 3 /* s */) static void current_tab_on_item_draw (size_t item_index, struct row_buffer *buffer, int width) { // 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; if (artist && title) row_buffer_append_args (buffer, artist, attrs, " - ", attrs, title, attrs, NULL); else row_buffer_append (buffer, compact_map_find (map, "file"), attrs); row_buffer_align (buffer, width - DURATION_MAX_LEN, attrs); 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); char *right_aligned = xstrdup_printf ("%*s", DURATION_MAX_LEN, s); row_buffer_append (buffer, right_aligned, attrs); free (right_aligned); free (s); } static void mpd_on_move_response (const struct mpd_response *response, const struct strv *data, void *user_data) { (void) data; *(bool *) user_data = false; if (!response->success) print_error ("%s: %s", "command failed", response->message_text); } static void current_tab_move (int from, int to) { compact_map_t map; const char *id; if (!(map = item_list_get (&g.playlist, from)) || !(id = compact_map_find (map, "id"))) return; char *target_str = xstrdup_printf ("%d", to); mpd_client_send_command (&g.client, "moveid", id, target_str, NULL); free (target_str); } static bool current_tab_move_selection (int diff) { static bool already_moving; if (already_moving || diff == 0) return true; struct mpd_client *c = &g.client; if (c->state != MPD_CONNECTED) return false; struct tab *tab = &g_current_tab; struct tab_range range = tab_selection_range (tab); if (range.from + diff < 0 || range.upto + diff >= (int) tab->item_count) return false; mpd_client_list_begin (c); if (diff < 0) for (int i = range.from; i <= range.upto; i++) current_tab_move (i, i + diff); else for (int i = range.upto; i >= range.from; i--) current_tab_move (i, i + diff); mpd_client_list_end (c); mpd_client_add_task (c, mpd_on_move_response, &already_moving); mpd_client_idle (c, 0); return already_moving = true; } static bool current_tab_on_action (enum action action) { struct tab *tab = &g_current_tab; compact_map_t map = item_list_get (&g.playlist, tab->item_selected); switch (action) { const char *id; case ACTION_MOVE_UP: return current_tab_move_selection (-1); case ACTION_MOVE_DOWN: return current_tab_move_selection (+1); case ACTION_CHOOSE: tab->item_mark = -1; return map && (id = compact_map_find (map, "id")) && MPD_SIMPLE ("playid", id); case ACTION_DELETE: { struct mpd_client *c = &g.client; struct tab_range range = tab_selection_range (tab); if (range.from < 0 || c->state != MPD_CONNECTED) return false; mpd_client_list_begin (c); for (int i = range.from; i <= range.upto; i++) { if ((map = item_list_get (&g.playlist, i)) && (id = compact_map_find (map, "id"))) mpd_client_send_command (c, "deleteid", id, NULL); } mpd_client_list_end (c); mpd_client_add_task (c, mpd_on_simple_response, NULL); mpd_client_idle (c, 0); return true; } default: return false; } } static void current_tab_update (void) { g_current_tab.item_count = g.playlist.len; g_current_tab.item_mark = MIN ((int) g.playlist.len - 1, g_current_tab.item_mark); app_invalidate (); } static struct tab * current_tab_init (void) { struct tab *super = &g_current_tab; tab_init (super, "Current"); super->can_multiselect = true; super->on_action = current_tab_on_action; super->on_item_draw = current_tab_on_item_draw; return super; } // --- Library tab ------------------------------------------------------------- struct library_level { LIST_HEADER (struct library_level) int item_top; ///< Stored state int item_selected; ///< Stored state char path[]; ///< Path of the level }; 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 void library_tab_on_item_draw (size_t item_index, struct row_buffer *buffer, int width) { (void) width; 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; row_buffer_append_args (buffer, prefix, attrs, name, attrs, NULL); if (x->duration < 0) return; char *s = app_time_string (x->duration); row_buffer_align (buffer, width - 2 /* gap */ - strlen (s), 0); row_buffer_append_args (buffer, " " /* gap */, 0, s, 0, NULL); free (s); } 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_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_draw = library_tab_on_item_draw; 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; default: return false; } if (e) { print_error ("%s", e->message); error_free (e); } return true; } static void streams_tab_on_item_draw (size_t item_index, struct row_buffer *buffer, int width) { (void) width; row_buffer_append (buffer, g.streams.vector[item_index], 0); } 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_draw = streams_tab_on_item_draw; 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 void info_tab_on_item_draw (size_t item_index, struct row_buffer *buffer, int width) { (void) width; // It looks like we could do with a generic list structure that just // stores formatted row_buffers. Let's see for other tabs: // - Current -- unusable, has dynamic column alignment // - Library -- could work for the "icons" // - Streams -- useless // - Debug -- it'd take up considerably more space // However so far we're only showing show key-value pairs. row_buffer_append_args (buffer, g_info_tab.keys.vector[item_index], A_BOLD, ":", A_BOLD, NULL); row_buffer_space (buffer, 8 - buffer->total_width, 0); row_buffer_append (buffer, g_info_tab.values.vector[item_index], 0); } 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_draw = info_tab_on_item_draw; 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 || action != ACTION_CHOOSE) return false; action = g_help_tab.actions[tab->item_selected]; return action != ACTION_NONE && action != ACTION_CHOOSE // avoid recursion && app_process_action (action); } static void help_tab_strfkey (const termo_key_t *key, struct strv *out) { // 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); strv_append (out, buf); } 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) help_tab_strfkey (&keys[k].decoded, &ass); if (ass.len) { char *joined = strv_join (&ass, ", "); strv_append_owned (out, xstrdup_printf (" %-30s %s", g_action_descriptions[i], 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 (" %-30s", g_action_descriptions[i])); help_tab_assign_action (i); } } static void help_tab_on_item_draw (size_t item_index, struct row_buffer *buffer, int width) { (void) width; hard_assert (item_index < g_help_tab.lines.len); const char *line = g_help_tab.lines.vector[item_index]; row_buffer_append (buffer, line, *line == ' ' ? 0 : A_BOLD); } 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_draw = help_tab_on_item_draw; 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 void debug_tab_on_item_draw (size_t item_index, struct row_buffer *buffer, int width) { 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)); row_buffer_append (buffer, prefix, 0); free (prefix); row_buffer_append (buffer, " ", item->attrs); row_buffer_append (buffer, item->text, item->attrs); // We override the formatting including colors -- do it for the whole line row_buffer_align (buffer, width, item->attrs); } 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_draw = debug_tab_on_item_draw; 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 if (g.spectrum_row != -1) { // Don't mess up the line editor caret, when it's shown int last_x, last_y; getyx (stdscr, last_y, last_x); attrset (APP_ATTR (TAB_BAR)); mvaddstr (g.spectrum_row, g.spectrum_column, g.spectrum.spectrum); attrset (0); move (last_y, last_x); refresh (); } else app_invalidate (); } // 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); g.spectrum_row = g.spectrum_column = -1; 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); 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, &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); } 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); } // --- 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 void app_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; termo_mouse_event_t type, type_last; if (termo_interpret_mouse (g.tk, event, &type, &button, &y, &x)) { bool double_click = 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; if (!app_process_mouse (type, y, x, button, double_click)) beep (); // Prevent interpreting triple clicks as two double clicks if (double_click) last_button = 0; else if (type == TERMO_MOUSE_PRESS) last_button = button; } else if (!app_process_termo_event (event)) beep (); last_event = *event; last_event_ts = event_ts; } static void app_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) app_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 app_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 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 (); if (g_winch_received) { g_winch_received = false; update_curses_terminal_size (); app_invalidate (); } } static void app_on_message_timer (void *user_data) { (void) user_data; cstr_set (&g.message, 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); str_append_vprintf (&message, fmt, ap); // If the standard error output isn't redirected, try our best at showing // the message to the user if (!isatty (STDERR_FILENO)) fprintf (stderr, "%s\n", message.str); else if (g_debug_tab.active) debug_tab_push (str_steal (&message), user_data == NULL ? 0 : g.attrs[(intptr_t) user_data].attrs); else { cstr_set (&g.message, xstrdup (message.str)); app_invalidate (); poller_timer_set (&g.message_timer, 5000); } 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.tty_event = poller_fd_make (&g.poller, STDIN_FILENO); g.tty_event.dispatcher = app_on_tty_readable; poller_fd_set (&g.tty_event, POLLIN); g.message_timer = poller_timer_make (&g.poller); g.message_timer.dispatcher = app_on_message_timer; g.tk_timer = poller_timer_make (&g.poller); g.tk_timer.dispatcher = app_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; } 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" }, { 'h', "help", NULL, 0, "display this help and exit" }, { 'V', "version", NULL, 0, "output version information and exit" }, { 0, NULL, NULL, 0, NULL } }; struct opt_handler oh = opt_handler_make (argc, argv, opts, "[URL | PATH]...", "Terminal-based MPD client."); int c; while ((c = opt_handler_get (&oh)) != -1) switch (c) { case 'd': g_debug_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 (); app_init_terminal (); 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); endwin (); g_log_message_real = log_message_stdio; app_free_context (); return 0; }