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_BITRATE,
  40 };
  41
  42 static const char *const tag_labels[] = {
  43         [MPD_TAG_ARTIST] = N_("Artist"),
  44         [MPD_TAG_TITLE] = N_("Title"),
  45         [MPD_TAG_ALBUM] = N_("Album"),
  46         [LABEL_LENGTH] = N_("Length"),
  47         [MPD_TAG_COMPOSER] = N_("Composer"),
  48         [MPD_TAG_NAME] = N_("Name"),
  49         [MPD_TAG_DISC] = N_("Disc"),
  50         [MPD_TAG_TRACK] = N_("Track"),
  51         [MPD_TAG_DATE] = N_("Date"),
  52         [MPD_TAG_GENRE] = N_("Genre"),
  53         [MPD_TAG_COMMENT] = N_("Comment"),
  54         [LABEL_BITRATE] = N_("Bitrate"),
  55 };
  56
  57 static unsigned max_tag_label_width;
  58
  59 enum stats_label {
  60         STATS_ARTISTS,
  61         STATS_ALBUMS,
  62         STATS_SONGS,
  63         STATS_UPTIME,
  64         STATS_DBUPTIME,
  65         STATS_PLAYTIME,
  66         STATS_DBPLAYTIME,
  67 };
  68
  69 static const char *const stats_labels[] = {
  70         [STATS_ARTISTS] = N_("Number of artists"),
  71         [STATS_ALBUMS] = N_("Number of albums"),
  72         [STATS_SONGS] = N_("Number of songs"),
  73         [STATS_UPTIME] = N_("Uptime"),
  74         [STATS_DBUPTIME] = N_("Most recent db update"),
  75         [STATS_PLAYTIME] = N_("Playtime"),
  76         [STATS_DBPLAYTIME] = N_("DB playtime"),
  77 };
  78
  79 static unsigned max_stats_label_width;
  80
  81 static struct list_window *lw;
  82
  83 static struct mpd_song *next_song;
  84
  85 static struct {
  86         struct mpd_song *selected_song;
  87         struct mpd_song *played_song;
  88         GPtrArray *lines;
  89 } current;
  90
  91 static void
  92 screen_song_clear(void)
  93 {
  94         for (guint i = 0; i < current.lines->len; ++i)
  95                 g_free(g_ptr_array_index(current.lines, i));
  96
  97         g_ptr_array_set_size(current.lines, 0);
  98
  99         if (current.selected_song != NULL) {
 100                 mpd_song_free(current.selected_song);
 101                 current.selected_song = NULL;
 102         }
 103         if (current.played_song != NULL) {
 104                 mpd_song_free(current.played_song);
 105                 current.played_song = NULL;
 106         }
 107 }
 108
 109 static void
 110 screen_song_paint(void);
 111
 112 /**
 113  * Repaint and update the screen.
 114  */
 115 static void
 116 screen_song_repaint(void)
 117 {
 118         screen_song_paint();
 119         wrefresh(lw->w);
 120 }
 121
 122 static const char *
 123 screen_song_list_callback(unsigned idx, G_GNUC_UNUSED void *data)
 124 {
 125         assert(idx < current.lines->len);
 126
 127         return g_ptr_array_index(current.lines, idx);
 128 }
 129
 130
 131 static void
 132 screen_song_init(WINDOW *w, int cols, int rows)
 133 {
 134         for (unsigned i = 0; i < G_N_ELEMENTS(tag_labels); ++i) {
 135                 if (tag_labels[i] != NULL) {
 136                         unsigned width = utf8_width(_(tag_labels[i]));
 137
 138                         if (width > max_tag_label_width)
 139                                 max_tag_label_width = width;
 140                 }
 141         }
 142
 143         for (unsigned i = 0; i < G_N_ELEMENTS(stats_labels); ++i) {
 144                 if (stats_labels[i] != NULL) {
 145                         unsigned width = utf8_width(_(stats_labels[i]));
 146
 147                         if (width > max_stats_label_width)
 148                                 max_stats_label_width = width;
 149                 }
 150         }
 151
 152         /* We will need at least 10 lines, so this saves 10 reallocations :) */
 153         current.lines = g_ptr_array_sized_new(10);
 154         lw = list_window_init(w, cols, rows);
 155         lw->hide_cursor = true;
 156 }
 157
 158 static void
 159 screen_song_exit(void)
 160 {
 161         list_window_free(lw);
 162
 163         screen_song_clear();
 164
 165         g_ptr_array_free(current.lines, TRUE);
 166         current.lines = NULL;
 167 }
 168
 169 static void
 170 screen_song_resize(int cols, int rows)
 171 {
 172         list_window_resize(lw, cols, rows);
 173 }
 174
 175 static const char *
 176 screen_song_title(G_GNUC_UNUSED char *str, G_GNUC_UNUSED size_t size)
 177 {
 178         return _("Song viewer");
 179 }
 180
 181 static void
 182 screen_song_paint(void)
 183 {
 184         list_window_paint(lw, screen_song_list_callback, NULL);
 185 }
 186
 187 /* Appends a line with a fixed width for the label column
 188  * Handles NULL strings gracefully */
 189 static void
 190 screen_song_append(const char *label, const char *value, unsigned label_col)
 191 {
 192         unsigned label_width = locale_width(label) + 2;
 193         int value_col, label_size;
 194         gchar *entry, *entry_iter;
 195         const gchar *value_iter;
 196         char *p, *q;
 197         unsigned width;
 198
 199         assert(label != NULL);
 200         assert(value != NULL);
 201         assert(g_utf8_validate(value, -1, NULL));
 202
 203         /* +2 for ': ' */
 204         label_col += 2;
 205         value_col = lw->cols - label_col;
 206         /* calculate the number of required linebreaks */
 207         value_iter = value;
 208         label_size = strlen(label) + label_col;
 209
 210         while (*value_iter != 0) {
 211                 entry = g_malloc(label_size);
 212                 if (value_iter == value) {
 213                         entry_iter = entry + g_sprintf(entry, "%s: ", label);
 214                         /* fill the label column with whitespaces */
 215                         memset(entry_iter, ' ', label_col - label_width);
 216                         entry_iter += label_col - label_width;
 217                 }
 218                 else {
 219                         /* fill the label column with whitespaces */
 220                         memset(entry, ' ', label_col);
 221                         entry_iter = entry + label_col;
 222                 }
 223                 /* skip whitespaces */
 224                 while (g_ascii_isspace(*value_iter)) ++value_iter;
 225
 226                 p = g_strdup(value_iter);
 227                 width = utf8_cut_width(p, value_col);
 228                 if (width == 0)
 229                         /* not enough room for anything - bail out */
 230                         break;
 231
 232                 *entry_iter = 0;
 233
 234                 value_iter += strlen(p);
 235                 p = replace_utf8_to_locale(p);
 236                 q = g_strconcat(entry, p, NULL);
 237                 g_free(entry);
 238                 g_free(p);
 239
 240                 g_ptr_array_add(current.lines, q);
 241         }
 242 }
 243
 244 static void
 245 screen_song_append_tag(const struct mpd_song *song, enum mpd_tag_type tag)
 246 {
 247         const char *label = _(tag_labels[tag]);
 248         unsigned i = 0;
 249         const char *value;
 250
 251         assert((unsigned)tag < G_N_ELEMENTS(tag_labels));
 252         assert(label != NULL);
 253
 254         while ((value = mpd_song_get_tag(song, tag, i++)) != NULL)
 255                 screen_song_append(label, value, max_tag_label_width);
 256 }
 257
 258 static void
 259 screen_song_add_song(const struct mpd_song *song, const struct mpdclient *c)
 260 {
 261         assert(song != NULL);
 262
 263         screen_song_append_tag(song, MPD_TAG_ARTIST);
 264         screen_song_append_tag(song, MPD_TAG_TITLE);
 265         screen_song_append_tag(song, MPD_TAG_ALBUM);
 266
 267         /* create time string and add it */
 268         if (mpd_song_get_duration(song) > 0) {
 269                 char length[16];
 270                 format_duration_short(length, sizeof(length),
 271                                       mpd_song_get_duration(song));
 272                 screen_song_append(_(tag_labels[LABEL_LENGTH]), length,
 273                                    max_tag_label_width);
 274         }
 275
 276         screen_song_append_tag(song, MPD_TAG_COMPOSER);
 277         screen_song_append_tag(song, MPD_TAG_NAME);
 278         screen_song_append_tag(song, MPD_TAG_DISC);
 279         screen_song_append_tag(song, MPD_TAG_TRACK);
 280         screen_song_append_tag(song, MPD_TAG_DATE);
 281         screen_song_append_tag(song, MPD_TAG_GENRE);
 282         screen_song_append_tag(song, MPD_TAG_COMMENT);
 283
 284         screen_song_append(_("Path"), mpd_song_get_uri(song),
 285                            max_tag_label_width);
 286         if (mpdclient_is_playing(c) && c->song != NULL &&
 287             strcmp(mpd_song_get_uri(c->song), mpd_song_get_uri(song)) == 0) {
 288                 char buf[16];
 289                 g_snprintf(buf, sizeof(buf), _("%d kbps"),
 290                            mpd_status_get_kbit_rate(c->status));
 291                 screen_song_append(_(tag_labels[LABEL_BITRATE]), buf,
 292                                    max_tag_label_width);
 293         }
 294 }
 295
 296 static void
 297 screen_song_append_stats(enum stats_label label, const char *value)
 298 {
 299         screen_song_append(_(stats_labels[label]), value,
 300                            max_stats_label_width);
 301 }
 302
 303 static bool
 304 screen_song_add_stats(struct mpd_connection *connection)
 305 {
 306         char buf[64];
 307         GDate *date;
 308         struct mpd_stats *mpd_stats;
 309
 310         mpd_stats = mpd_run_stats(connection);
 311         if (mpd_stats == NULL)
 312                 return false;
 313
 314         g_ptr_array_add(current.lines, g_strdup(_("MPD statistics")) );
 315         g_snprintf(buf, sizeof(buf), "%d",
 316                    mpd_stats_get_number_of_artists(mpd_stats));
 317         screen_song_append_stats(STATS_ARTISTS, buf);
 318         g_snprintf(buf, sizeof(buf), "%d",
 319                    mpd_stats_get_number_of_albums(mpd_stats));
 320         screen_song_append_stats(STATS_ALBUMS, buf);
 321         g_snprintf(buf, sizeof(buf), "%d",
 322                    mpd_stats_get_number_of_songs(mpd_stats));
 323         screen_song_append_stats(STATS_SONGS, buf);
 324
 325         format_duration_long(buf, sizeof(buf),
 326                              mpd_stats_get_db_play_time(mpd_stats));
 327         screen_song_append_stats(STATS_DBPLAYTIME, buf);
 328
 329         format_duration_long(buf, sizeof(buf),
 330                              mpd_stats_get_play_time(mpd_stats));
 331         screen_song_append_stats(STATS_PLAYTIME, buf);
 332
 333         format_duration_long(buf, sizeof(buf),
 334                              mpd_stats_get_uptime(mpd_stats));
 335         screen_song_append_stats(STATS_UPTIME, buf);
 336
 337         date = g_date_new();
 338         g_date_set_time_t(date, mpd_stats_get_db_update_time(mpd_stats));
 339         g_date_strftime(buf, sizeof(buf), "%x", date);
 340         screen_song_append_stats(STATS_DBUPTIME, buf);
 341         g_date_free(date);
 342
 343         mpd_stats_free(mpd_stats);
 344         return true;
 345 }
 346
 347 static void
 348 screen_song_update(struct mpdclient *c)
 349 {
 350         struct mpd_connection *connection;
 351
 352         /* Clear all lines */
 353         for (guint i = 0; i < current.lines->len; ++i)
 354                 g_free(g_ptr_array_index(current.lines, i));
 355         g_ptr_array_set_size(current.lines, 0);
 356
 357         /* If a song was selected before the song screen was opened */
 358         if (next_song != NULL) {
 359                 assert(current.selected_song == NULL);
 360                 current.selected_song = next_song;
 361                 next_song = NULL;
 362         }
 363
 364         if (current.selected_song != NULL &&
 365                         (c->song == NULL ||
 366                          strcmp(mpd_song_get_uri(current.selected_song),
 367                                 mpd_song_get_uri(c->song)) != 0 ||
 368                          !mpdclient_is_playing(c))) {
 369                 g_ptr_array_add(current.lines, g_strdup(_("Selected song")) );
 370                 screen_song_add_song(current.selected_song, c);
 371                 g_ptr_array_add(current.lines, g_strdup("\0"));
 372         }
 373
 374         if (c->song != NULL && mpdclient_is_playing(c)) {
 375                 if (current.played_song != NULL) {
 376                         mpd_song_free(current.played_song);
 377                 }
 378                 current.played_song = mpd_song_dup(c->song);
 379                 g_ptr_array_add(current.lines, g_strdup(_("Currently playing song")));
 380                 screen_song_add_song(current.played_song, c);
 381                 g_ptr_array_add(current.lines, g_strdup("\0"));
 382         }
 383
 384         /* Add some statistics about mpd */
 385         connection = mpdclient_get_connection(c);
 386         if (connection != NULL && !screen_song_add_stats(connection))
 387                 mpdclient_handle_error(c);
 388
 389         list_window_set_length(lw, current.lines->len);
 390         screen_song_repaint();
 391 }
 392
 393 static bool
 394 screen_song_cmd(struct mpdclient *c, command_t cmd)
 395 {
 396         if (list_window_scroll_cmd(lw, cmd)) {
 397                 screen_song_repaint();
 398                 return true;
 399         }
 400
 401         switch(cmd) {
 402         case CMD_LOCATE:
 403                 if (current.selected_song != NULL) {
 404                         screen_file_goto_song(c, current.selected_song);
 405                         return true;
 406                 }
 407                 if (current.played_song != NULL) {
 408                         screen_file_goto_song(c, current.played_song);
 409                         return true;
 410                 }
 411
 412                 return false;
 413
 414 #ifdef ENABLE_LYRICS_SCREEN
 415         case CMD_SCREEN_LYRICS:
 416                 if (current.selected_song != NULL) {
 417                         screen_lyrics_switch(c, current.selected_song, false);
 418                         return true;
 419                 }
 420                 if (current.played_song != NULL) {
 421                         screen_lyrics_switch(c, current.played_song, true);
 422                         return true;
 423                 }
 424                 return false;
 425
 426 #endif
 427
 428         case CMD_SCREEN_SWAP:
 429                 if (current.selected_song != NULL)
 430                         screen_swap(c, current.selected_song);
 431                 else
 432                 // No need to check if this is null - we'd pass null anyway
 433                         screen_swap(c, current.played_song);
 434                 return true;
 435
 436         default:
 437                 break;
 438         }
 439
 440         if (screen_find(lw, cmd, screen_song_list_callback, NULL)) {
 441                 /* center the row */
 442                 list_window_center(lw, lw->selected);
 443                 screen_song_repaint();
 444                 return true;
 445         }
 446
 447         return false;
 448 }
 449
 450 const struct screen_functions screen_song = {
 451         .init = screen_song_init,
 452         .exit = screen_song_exit,
 453         .open = screen_song_update,
 454         .close = screen_song_clear,
 455         .resize = screen_song_resize,
 456         .paint = screen_song_paint,
 457         .update = screen_song_update,
 458         .cmd = screen_song_cmd,
 459         .get_title = screen_song_title,
 460 };
 461
 462 void
 463 screen_song_switch(struct mpdclient *c, const struct mpd_song *song)
 464 {
 465         assert(song != NULL);
 466         assert(current.selected_song == NULL);
 467         assert(current.played_song == NULL);
 468
 469         next_song = mpd_song_dup(song);
 470         screen_switch(&screen_song, c);
 471 }