src/screen_song.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2010 The Music Player Daemon Project
   3  * Project homepage: http://musicpd.org
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  18  */
  19
  20 #include "screen_song.h"
  21 #include "screen_interface.h"
  22 #include "screen_file.h"
  23 #include "screen_lyrics.h"
  24 #include "screen_find.h"
  25 #include "i18n.h"
  26 #include "screen.h"
  27 #include "charset.h"
  28 #include "utils.h"
  29 #include "mpdclient.h"
  30
  31 #include <mpd/client.h>
  32
  33 #include <glib/gprintf.h>
  34 #include <assert.h>
  35 #include <string.h>
  36
  37 enum {
  38         LABEL_LENGTH = MPD_TAG_COUNT,
  39         LABEL_PATH,
  40         LABEL_BITRATE,
  41         LABEL_FORMAT,
  42         LABEL_POSITION,
  43 };
  44
  45 static const char *const tag_labels[] = {
  46         [MPD_TAG_ARTIST] = N_("Artist"),
  47         [MPD_TAG_TITLE] = N_("Title"),
  48         [MPD_TAG_ALBUM] = N_("Album"),
  49         [LABEL_LENGTH] = N_("Length"),
  50         [LABEL_POSITION] = N_("Position"),
  51         [MPD_TAG_COMPOSER] = N_("Composer"),
  52         [MPD_TAG_NAME] = N_("Name"),
  53         [MPD_TAG_DISC] = N_("Disc"),
  54         [MPD_TAG_TRACK] = N_("Track"),
  55         [MPD_TAG_DATE] = N_("Date"),
  56         [MPD_TAG_GENRE] = N_("Genre"),
  57         [MPD_TAG_COMMENT] = N_("Comment"),
  58         [LABEL_PATH] = N_("Path"),
  59         [LABEL_BITRATE] = N_("Bitrate"),
  60         [LABEL_FORMAT] = N_("Format"),
  61 };
  62
  63 static unsigned max_tag_label_width;
  64
  65 enum stats_label {
  66         STATS_ARTISTS,
  67         STATS_ALBUMS,
  68         STATS_SONGS,
  69         STATS_UPTIME,
  70         STATS_DBUPTIME,
  71         STATS_PLAYTIME,
  72         STATS_DBPLAYTIME,
  73 };
  74
  75 static const char *const stats_labels[] = {
  76         [STATS_ARTISTS] = N_("Number of artists"),
  77         [STATS_ALBUMS] = N_("Number of albums"),
  78         [STATS_SONGS] = N_("Number of songs"),
  79         [STATS_UPTIME] = N_("Uptime"),
  80         [STATS_DBUPTIME] = N_("Most recent db update"),
  81         [STATS_PLAYTIME] = N_("Playtime"),
  82         [STATS_DBPLAYTIME] = N_("DB playtime"),
  83 };
  84
  85 static unsigned max_stats_label_width;
  86
  87 static struct list_window *lw;
  88
  89 static struct mpd_song *next_song;
  90
  91 static struct {
  92         struct mpd_song *selected_song;
  93         struct mpd_song *played_song;
  94         GPtrArray *lines;
  95 } current;
  96
  97 static void
  98 screen_song_clear(void)
  99 {
 100         for (guint i = 0; i < current.lines->len; ++i)
 101                 g_free(g_ptr_array_index(current.lines, i));
 102
 103         g_ptr_array_set_size(current.lines, 0);
 104
 105         if (current.selected_song != NULL) {
 106                 mpd_song_free(current.selected_song);
 107                 current.selected_song = NULL;
 108         }
 109         if (current.played_song != NULL) {
 110                 mpd_song_free(current.played_song);
 111                 current.played_song = NULL;
 112         }
 113 }
 114
 115 static void
 116 screen_song_paint(void);
 117
 118 /**
 119  * Repaint and update the screen.
 120  */
 121 static void
 122 screen_song_repaint(void)
 123 {
 124         screen_song_paint();
 125         wrefresh(lw->w);
 126 }
 127
 128 static const char *
 129 screen_song_list_callback(unsigned idx, gcc_unused void *data)
 130 {
 131         assert(idx < current.lines->len);
 132
 133         return g_ptr_array_index(current.lines, idx);
 134 }
 135
 136
 137 static void
 138 screen_song_init(WINDOW *w, int cols, int rows)
 139 {
 140         for (unsigned i = 0; i < G_N_ELEMENTS(tag_labels); ++i) {
 141                 if (tag_labels[i] != NULL) {
 142                         unsigned width = utf8_width(_(tag_labels[i]));
 143
 144                         if (width > max_tag_label_width)
 145                                 max_tag_label_width = width;
 146                 }
 147         }
 148
 149         for (unsigned i = 0; i < G_N_ELEMENTS(stats_labels); ++i) {
 150                 if (stats_labels[i] != NULL) {
 151                         unsigned width = utf8_width(_(stats_labels[i]));
 152
 153                         if (width > max_stats_label_width)
 154                                 max_stats_label_width = width;
 155                 }
 156         }
 157
 158         /* We will need at least 10 lines, so this saves 10 reallocations :) */
 159         current.lines = g_ptr_array_sized_new(10);
 160         lw = list_window_init(w, cols, rows);
 161         lw->hide_cursor = true;
 162 }
 163
 164 static void
 165 screen_song_exit(void)
 166 {
 167         list_window_free(lw);
 168
 169         screen_song_clear();
 170
 171         g_ptr_array_free(current.lines, TRUE);
 172         current.lines = NULL;
 173 }
 174
 175 static void
 176 screen_song_resize(int cols, int rows)
 177 {
 178         list_window_resize(lw, cols, rows);
 179 }
 180
 181 static const char *
 182 screen_song_title(gcc_unused char *str, gcc_unused size_t size)
 183 {
 184         return _("Song viewer");
 185 }
 186
 187 static void
 188 screen_song_paint(void)
 189 {
 190         list_window_paint(lw, screen_song_list_callback, NULL);
 191 }
 192
 193 /* Appends a line with a fixed width for the label column
 194  * Handles NULL strings gracefully */
 195 static void
 196 screen_song_append(const char *label, const char *value, unsigned label_col)
 197 {
 198         const unsigned label_width = locale_width(label) + 2;
 199
 200         assert(label != NULL);
 201         assert(value != NULL);
 202         assert(g_utf8_validate(value, -1, NULL));
 203
 204         /* +2 for ': ' */
 205         label_col += 2;
 206         const int value_col = lw->cols - label_col;
 207         /* calculate the number of required linebreaks */
 208         const gchar *value_iter = value;
 209         const int label_size = strlen(label) + label_col;
 210
 211         while (*value_iter != 0) {
 212                 char *entry = g_malloc(label_size), *entry_iter;
 213                 if (value_iter == value) {
 214                         entry_iter = entry + g_sprintf(entry, "%s: ", label);
 215                         /* fill the label column with whitespaces */
 216                         memset(entry_iter, ' ', label_col - label_width);
 217                         entry_iter += label_col - label_width;
 218                 }
 219                 else {
 220                         /* fill the label column with whitespaces */
 221                         memset(entry, ' ', label_col);
 222                         entry_iter = entry + label_col;
 223                 }
 224                 /* skip whitespaces */
 225                 while (g_ascii_isspace(*value_iter)) ++value_iter;
 226
 227                 char *p = g_strdup(value_iter);
 228                 unsigned width = utf8_cut_width(p, value_col);
 229                 if (width == 0)
 230                         /* not enough room for anything - bail out */
 231                         break;
 232
 233                 *entry_iter = 0;
 234
 235                 value_iter += strlen(p);
 236                 p = replace_utf8_to_locale(p);
 237                 char *q = g_strconcat(entry, p, NULL);
 238                 g_free(entry);
 239                 g_free(p);
 240
 241                 g_ptr_array_add(current.lines, q);
 242         }
 243 }
 244
 245 static void
 246 screen_song_append_tag(const struct mpd_song *song, enum mpd_tag_type tag)
 247 {
 248         const char *label = _(tag_labels[tag]);
 249         unsigned i = 0;
 250         const char *value;
 251
 252         assert((unsigned)tag < G_N_ELEMENTS(tag_labels));
 253         assert(label != NULL);
 254
 255         while ((value = mpd_song_get_tag(song, tag, i++)) != NULL)
 256                 screen_song_append(label, value, max_tag_label_width);
 257 }
 258
 259 static void
 260 screen_song_add_song(const struct mpd_song *song, const struct mpdclient *c)
 261 {
 262         assert(song != NULL);
 263
 264         char songpos[16];
 265         g_snprintf(songpos, sizeof(songpos), "%d", mpd_song_get_pos(song) + 1);
 266         screen_song_append(_(tag_labels[LABEL_POSITION]), songpos,
 267                            max_tag_label_width);
 268
 269         screen_song_append_tag(song, MPD_TAG_ARTIST);
 270         screen_song_append_tag(song, MPD_TAG_TITLE);
 271         screen_song_append_tag(song, MPD_TAG_ALBUM);
 272
 273         /* create time string and add it */
 274         if (mpd_song_get_duration(song) > 0) {
 275                 char length[16];
 276                 format_duration_short(length, sizeof(length),
 277                                       mpd_song_get_duration(song));
 278
 279                 const char *value = length;
 280
 281                 char buffer[64];
 282
 283                 if (mpd_song_get_end(song) > 0) {
 284                         char start[16], end[16];
 285                         format_duration_short(start, sizeof(start),
 286                                               mpd_song_get_start(song));
 287                         format_duration_short(end, sizeof(end),
 288                                               mpd_song_get_end(song));
 289
 290                         snprintf(buffer, sizeof(buffer), "%s [%s-%s]\n",
 291                                  length, start, end);
 292                         value = buffer;
 293                 } else if (mpd_song_get_start(song) > 0) {
 294                         char start[16];
 295                         format_duration_short(start, sizeof(start),
 296                                               mpd_song_get_start(song));
 297
 298                         snprintf(buffer, sizeof(buffer), "%s [%s-]\n",
 299                                  length, start);
 300                         value = buffer;
 301                 }
 302
 303                 screen_song_append(_(tag_labels[LABEL_LENGTH]), value,
 304                                    max_tag_label_width);
 305         }
 306
 307         screen_song_append_tag(song, MPD_TAG_COMPOSER);
 308         screen_song_append_tag(song, MPD_TAG_NAME);
 309         screen_song_append_tag(song, MPD_TAG_DISC);
 310         screen_song_append_tag(song, MPD_TAG_TRACK);
 311         screen_song_append_tag(song, MPD_TAG_DATE);
 312         screen_song_append_tag(song, MPD_TAG_GENRE);
 313         screen_song_append_tag(song, MPD_TAG_COMMENT);
 314
 315         screen_song_append(_(tag_labels[LABEL_PATH]), mpd_song_get_uri(song),
 316                            max_tag_label_width);
 317         if (mpdclient_is_playing(c) && c->song != NULL &&
 318             strcmp(mpd_song_get_uri(c->song), mpd_song_get_uri(song)) == 0 &&
 319             mpd_status_get_kbit_rate(c->status)) {
 320                 char buf[16];
 321                 g_snprintf(buf, sizeof(buf), _("%d kbps"),
 322                            mpd_status_get_kbit_rate(c->status));
 323                 screen_song_append(_(tag_labels[LABEL_BITRATE]), buf,
 324                                    max_tag_label_width);
 325
 326                 const struct mpd_audio_format *format =
 327                         mpd_status_get_audio_format(c->status);
 328                 if (format) {
 329                         g_snprintf(buf, sizeof(buf), _("%u:%u:%u"),
 330                                    format->sample_rate, format->bits,
 331                                    format->channels);
 332                         screen_song_append(_(tag_labels[LABEL_FORMAT]), buf,
 333                                            max_tag_label_width);
 334                 }
 335         }
 336 }
 337
 338 static void
 339 screen_song_append_stats(enum stats_label label, const char *value)
 340 {
 341         screen_song_append(_(stats_labels[label]), value,
 342                            max_stats_label_width);
 343 }
 344
 345 static bool
 346 screen_song_add_stats(struct mpd_connection *connection)
 347 {
 348         struct mpd_stats *mpd_stats = mpd_run_stats(connection);
 349         if (mpd_stats == NULL)
 350                 return false;
 351
 352         g_ptr_array_add(current.lines, g_strdup(_("MPD statistics")) );
 353
 354         char buf[64];
 355         g_snprintf(buf, sizeof(buf), "%d",
 356                    mpd_stats_get_number_of_artists(mpd_stats));
 357         screen_song_append_stats(STATS_ARTISTS, buf);
 358         g_snprintf(buf, sizeof(buf), "%d",
 359                    mpd_stats_get_number_of_albums(mpd_stats));
 360         screen_song_append_stats(STATS_ALBUMS, buf);
 361         g_snprintf(buf, sizeof(buf), "%d",
 362                    mpd_stats_get_number_of_songs(mpd_stats));
 363         screen_song_append_stats(STATS_SONGS, buf);
 364
 365         format_duration_long(buf, sizeof(buf),
 366                              mpd_stats_get_db_play_time(mpd_stats));
 367         screen_song_append_stats(STATS_DBPLAYTIME, buf);
 368
 369         format_duration_long(buf, sizeof(buf),
 370                              mpd_stats_get_play_time(mpd_stats));
 371         screen_song_append_stats(STATS_PLAYTIME, buf);
 372
 373         format_duration_long(buf, sizeof(buf),
 374                              mpd_stats_get_uptime(mpd_stats));
 375         screen_song_append_stats(STATS_UPTIME, buf);
 376
 377         GDate *date = g_date_new();
 378         g_date_set_time_t(date, mpd_stats_get_db_update_time(mpd_stats));
 379         g_date_strftime(buf, sizeof(buf), "%x", date);
 380         screen_song_append_stats(STATS_DBUPTIME, buf);
 381         g_date_free(date);
 382
 383         mpd_stats_free(mpd_stats);
 384         return true;
 385 }
 386
 387 static void
 388 screen_song_update(struct mpdclient *c)
 389 {
 390         /* Clear all lines */
 391         for (guint i = 0; i < current.lines->len; ++i)
 392                 g_free(g_ptr_array_index(current.lines, i));
 393         g_ptr_array_set_size(current.lines, 0);
 394
 395         /* If a song was selected before the song screen was opened */
 396         if (next_song != NULL) {
 397                 assert(current.selected_song == NULL);
 398                 current.selected_song = next_song;
 399                 next_song = NULL;
 400         }
 401
 402         if (current.selected_song != NULL &&
 403                         (c->song == NULL ||
 404                          strcmp(mpd_song_get_uri(current.selected_song),
 405                                 mpd_song_get_uri(c->song)) != 0 ||
 406                          !mpdclient_is_playing(c))) {
 407                 g_ptr_array_add(current.lines, g_strdup(_("Selected song")) );
 408                 screen_song_add_song(current.selected_song, c);
 409                 g_ptr_array_add(current.lines, g_strdup("\0"));
 410         }
 411
 412         if (c->song != NULL && mpdclient_is_playing(c)) {
 413                 if (current.played_song != NULL) {
 414                         mpd_song_free(current.played_song);
 415                 }
 416                 current.played_song = mpd_song_dup(c->song);
 417                 g_ptr_array_add(current.lines, g_strdup(_("Currently playing song")));
 418                 screen_song_add_song(current.played_song, c);
 419                 g_ptr_array_add(current.lines, g_strdup("\0"));
 420         }
 421
 422         /* Add some statistics about mpd */
 423         struct mpd_connection *connection = mpdclient_get_connection(c);
 424         if (connection != NULL && !screen_song_add_stats(connection))
 425                 mpdclient_handle_error(c);
 426
 427         list_window_set_length(lw, current.lines->len);
 428         screen_song_repaint();
 429 }
 430
 431 static bool
 432 screen_song_cmd(struct mpdclient *c, command_t cmd)
 433 {
 434         if (list_window_scroll_cmd(lw, cmd)) {
 435                 screen_song_repaint();
 436                 return true;
 437         }
 438
 439         switch(cmd) {
 440         case CMD_LOCATE:
 441                 if (current.selected_song != NULL) {
 442                         screen_file_goto_song(c, current.selected_song);
 443                         return true;
 444                 }
 445                 if (current.played_song != NULL) {
 446                         screen_file_goto_song(c, current.played_song);
 447                         return true;
 448                 }
 449
 450                 return false;
 451
 452 #ifdef ENABLE_LYRICS_SCREEN
 453         case CMD_SCREEN_LYRICS:
 454                 if (current.selected_song != NULL) {
 455                         screen_lyrics_switch(c, current.selected_song, false);
 456                         return true;
 457                 }
 458                 if (current.played_song != NULL) {
 459                         screen_lyrics_switch(c, current.played_song, true);
 460                         return true;
 461                 }
 462                 return false;
 463
 464 #endif
 465
 466         case CMD_SCREEN_SWAP:
 467                 if (current.selected_song != NULL)
 468                         screen_swap(c, current.selected_song);
 469                 else
 470                 // No need to check if this is null - we'd pass null anyway
 471                         screen_swap(c, current.played_song);
 472                 return true;
 473
 474         default:
 475                 break;
 476         }
 477
 478         if (screen_find(lw, cmd, screen_song_list_callback, NULL)) {
 479                 /* center the row */
 480                 list_window_center(lw, lw->selected);
 481                 screen_song_repaint();
 482                 return true;
 483         }
 484
 485         return false;
 486 }
 487
 488 const struct screen_functions screen_song = {
 489         .init = screen_song_init,
 490         .exit = screen_song_exit,
 491         .open = screen_song_update,
 492         .close = screen_song_clear,
 493         .resize = screen_song_resize,
 494         .paint = screen_song_paint,
 495         .update = screen_song_update,
 496         .cmd = screen_song_cmd,
 497         .get_title = screen_song_title,
 498 };
 499
 500 void
 501 screen_song_switch(struct mpdclient *c, const struct mpd_song *song)
 502 {
 503         assert(song != NULL);
 504         assert(current.selected_song == NULL);
 505         assert(current.played_song == NULL);
 506
 507         next_song = mpd_song_dup(song);
 508         screen_switch(&screen_song, c);
 509 }