src/screen_song.c

   1 /* ncmpc (Ncurses MPD Client)
   2  * (c) 2004-2009 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 static list_window_t *lw;
  38
  39 static struct mpd_song *next_song;
  40
  41 static struct {
  42         struct mpd_song *selected_song;
  43         struct mpd_song *played_song;
  44         GPtrArray *lines;
  45 } current;
  46
  47 static void
  48 screen_song_clear(void)
  49 {
  50         for (guint i = 0; i < current.lines->len; ++i)
  51                 g_free(g_ptr_array_index(current.lines, i));
  52
  53         g_ptr_array_set_size(current.lines, 0);
  54
  55         if (current.selected_song != NULL) {
  56                 mpd_song_free(current.selected_song);
  57                 current.selected_song = NULL;
  58         }
  59         if (current.played_song != NULL) {
  60                 mpd_song_free(current.played_song);
  61                 current.played_song = NULL;
  62         }
  63 }
  64
  65 static void
  66 screen_song_paint(void);
  67
  68 /**
  69  * Repaint and update the screen.
  70  */
  71 static void
  72 screen_song_repaint(void)
  73 {
  74         screen_song_paint();
  75         wrefresh(lw->w);
  76 }
  77
  78 static const char *
  79 screen_song_list_callback(unsigned idx, G_GNUC_UNUSED bool *highlight,
  80                           G_GNUC_UNUSED char** sc, G_GNUC_UNUSED void *data)
  81 {
  82         static char buffer[256];
  83         char *value;
  84
  85         if (idx >= current.lines->len)
  86                 return NULL;
  87
  88         value = utf8_to_locale(g_ptr_array_index(current.lines, idx));
  89         g_strlcpy(buffer, value, sizeof(buffer));
  90         g_free(value);
  91
  92         return buffer;
  93 }
  94
  95
  96 static void
  97 screen_song_init(WINDOW *w, int cols, int rows)
  98 {
  99         /* We will need at least 10 lines, so this saves 10 reallocations :) */
 100         current.lines = g_ptr_array_sized_new(10);
 101         lw = list_window_init(w, cols, rows);
 102         lw->hide_cursor = true;
 103 }
 104
 105 static void
 106 screen_song_exit(void)
 107 {
 108         list_window_free(lw);
 109
 110         screen_song_clear();
 111
 112         g_ptr_array_free(current.lines, TRUE);
 113         current.lines = NULL;
 114 }
 115
 116 static void
 117 screen_song_resize(int cols, int rows)
 118 {
 119         lw->cols = cols;
 120         lw->rows = rows;
 121 }
 122
 123 static const char *
 124 screen_song_title(G_GNUC_UNUSED char *str, G_GNUC_UNUSED size_t size)
 125 {
 126         return _("Song viewer");
 127 }
 128
 129 static void
 130 screen_song_paint(void)
 131 {
 132         list_window_paint(lw, screen_song_list_callback, NULL);
 133 }
 134
 135 /* Appends a line with a fixed width for the label column
 136  * Handles NULL strings gracefully */
 137 static void
 138 screen_song_append(const char *label, const char *value, unsigned label_col)
 139 {
 140         int value_col, linebreaks, entry_size, label_size;
 141         int i, k;
 142         gchar *entry, *entry_iter;
 143         const gchar *value_iter;
 144
 145         assert(label != NULL);
 146         assert(g_utf8_validate(label, -1, NULL));
 147
 148         if (value != NULL) {
 149                 assert(g_utf8_validate(value, -1, NULL));
 150                 /* +2 for ': ' */
 151                 label_col += 2;
 152                 value_col = lw->cols - label_col;
 153                 /* calculate the number of required linebreaks */
 154                 linebreaks = (utf8_width(value) - 1) / value_col + 1;
 155                 value_iter = value;
 156                 label_size = strlen(label) + label_col - utf8_width(label);
 157                 entry_size = label_size + strlen(value) + 2;
 158
 159                 for (i = 0; i < linebreaks; ++i)
 160                 {
 161                         entry = g_malloc(entry_size);
 162                         if (i == 0) {
 163                                 entry_iter = entry + g_sprintf(entry, "%s: ", label);
 164                                 /* fill the label column with whitespaces */
 165                                 for ( ; entry_iter < entry + label_size; ++entry_iter)
 166                                         *entry_iter = ' ';
 167                         }
 168                         else {
 169                                 entry_iter = entry;
 170                                 /* fill the label column with whitespaces */
 171                                 for ( ; entry_iter < entry + label_col; ++entry_iter)
 172                                         *entry_iter = ' ';
 173                         }
 174                         /* skip whitespaces */
 175                         while (g_ascii_isspace(*value_iter)) ++value_iter;
 176                         k = 0;
 177                         while (value_iter && k < value_col)
 178                         {
 179                                 g_utf8_strncpy(entry_iter, value_iter, 1);
 180                                 value_iter = g_utf8_find_next_char(value_iter, NULL);
 181                                 entry_iter = g_utf8_find_next_char(entry_iter, NULL);
 182                                 ++k;
 183                         }
 184                         *entry_iter = '\0';
 185                         g_ptr_array_add(current.lines, entry);
 186                 }
 187         }
 188 }
 189
 190 static void
 191 screen_song_append_tag(const char *label, const struct mpd_song *song,
 192                        enum mpd_tag_type tag, unsigned label_col)
 193 {
 194         unsigned i = 0;
 195         const char *value;
 196
 197         while ((value = mpd_song_get_tag(song, tag, i++)) != NULL)
 198                 screen_song_append(label, value, label_col);
 199 }
 200
 201 static void
 202 screen_song_add_song(const struct mpd_song *song, const struct mpdclient *c)
 203 {
 204         unsigned i, max_label_width;
 205         enum label {
 206                 ARTIST, TITLE, ALBUM, LENGTH, COMPOSER, NAME, DISC, TRACK,
 207                 DATE, GENRE, COMMENT, BITRATE
 208         };
 209         const char *labels[] = { [ARTIST] = _("Artist"),
 210                 [TITLE] = _("Title"),
 211                 [ALBUM] = _("Album"),
 212                 [LENGTH] = _("Length"),
 213                 [COMPOSER] = _("Composer"),
 214                 [NAME] = _("Name"),
 215                 [DISC] = _("Disc"),
 216                 [TRACK] = _("Track"),
 217                 [DATE] = _("Date"),
 218                 [GENRE] = _("Genre"),
 219                 [COMMENT] = _("Comment"),
 220                 [BITRATE] = _("Bitrate"),
 221         };
 222         /* Determine the width of the longest label */
 223         max_label_width = utf8_width(labels[0]);
 224         for (i = 1; i < G_N_ELEMENTS(labels); ++i) {
 225                 if (utf8_width(labels[i]) > max_label_width)
 226                         max_label_width = utf8_width(labels[i]);
 227         }
 228
 229         assert(song != NULL);
 230
 231         screen_song_append_tag(labels[ARTIST], song, MPD_TAG_ARTIST,
 232                                max_label_width);
 233         screen_song_append_tag(labels[TITLE], song, MPD_TAG_TITLE,
 234                                max_label_width);
 235         screen_song_append_tag(labels[ALBUM], song, MPD_TAG_ALBUM,
 236                                max_label_width);
 237         /* create time string and add it */
 238         if (mpd_song_get_duration(song) > 0) {
 239                 char length[16];
 240                 format_duration_short(length, sizeof(length),
 241                                       mpd_song_get_duration(song));
 242                 screen_song_append(labels[LENGTH], length, max_label_width);
 243         }
 244         screen_song_append_tag(labels[COMPOSER], song, MPD_TAG_COMPOSER,
 245                                max_label_width);
 246         screen_song_append_tag(labels[NAME], song, MPD_TAG_NAME,
 247                                max_label_width);
 248         screen_song_append_tag(labels[DISC], song, MPD_TAG_DISC,
 249                                max_label_width);
 250         screen_song_append_tag(labels[TRACK], song, MPD_TAG_TRACK,
 251                                max_label_width);
 252         screen_song_append_tag(labels[DATE], song, MPD_TAG_DATE,
 253                                max_label_width);
 254         screen_song_append_tag(labels[GENRE], song, MPD_TAG_GENRE,
 255                                max_label_width);
 256         screen_song_append_tag(labels[COMMENT], song, MPD_TAG_COMMENT,
 257                                max_label_width);
 258         screen_song_append(_("Path"), mpd_song_get_uri(song), max_label_width);
 259         if (c->status != NULL && c->song != NULL &&
 260             strcmp(mpd_song_get_uri(c->song), mpd_song_get_uri(song)) == 0 &&
 261             (mpd_status_get_state(c->status) == MPD_STATE_PLAY ||
 262              mpd_status_get_state(c->status) == MPD_STATE_PAUSE)) {
 263                 char buf[16];
 264                 g_snprintf(buf, sizeof(buf), _("%d kbps"),
 265                            mpd_status_get_kbit_rate(c->status));
 266                 screen_song_append(labels[BITRATE], buf, max_label_width);
 267         }
 268 }
 269
 270 static bool
 271 screen_song_add_stats(struct mpd_connection *connection)
 272 {
 273         unsigned i, max_label_width;
 274         char buf[64];
 275         GDate *date;
 276         enum label {
 277                 ARTISTS, ALBUMS, SONGS, UPTIME,
 278                 DBUPTIME, PLAYTIME, DBPLAYTIME
 279         };
 280         const char *labels[] = { [ARTISTS] = _("Number of artists"),
 281                 [ALBUMS] = _("Number of albums"),
 282                 [SONGS] = _("Number of songs"),
 283                 [UPTIME] = _("Uptime"),
 284                 [DBUPTIME] =_("Most recent db update"),
 285                 [PLAYTIME] = _("Playtime"),
 286                 [DBPLAYTIME] = _("DB playtime")
 287         };
 288         struct mpd_stats *mpd_stats;
 289
 290         mpd_stats = mpd_run_stats(connection);
 291         if (mpd_stats == NULL)
 292                 return false;
 293
 294         /* Determine the width of the longest label */
 295         max_label_width = utf8_width(labels[0]);
 296         for (i = 1; i < G_N_ELEMENTS(labels); ++i) {
 297                 if (utf8_width(labels[i]) > max_label_width)
 298                         max_label_width = utf8_width(labels[i]);
 299         }
 300
 301         g_ptr_array_add(current.lines, g_strdup(_("MPD statistics")) );
 302         g_snprintf(buf, sizeof(buf), "%d",
 303                    mpd_stats_get_number_of_artists(mpd_stats));
 304         screen_song_append(labels[ARTISTS], buf, max_label_width);
 305         g_snprintf(buf, sizeof(buf), "%d",
 306                    mpd_stats_get_number_of_albums(mpd_stats));
 307         screen_song_append(labels[ALBUMS], buf, max_label_width);
 308         g_snprintf(buf, sizeof(buf), "%d",
 309                    mpd_stats_get_number_of_songs(mpd_stats));
 310         screen_song_append(labels[SONGS], buf, max_label_width);
 311
 312         format_duration_long(buf, sizeof(buf),
 313                              mpd_stats_get_db_play_time(mpd_stats));
 314         screen_song_append(labels[DBPLAYTIME], buf, max_label_width);
 315
 316         format_duration_long(buf, sizeof(buf),
 317                              mpd_stats_get_play_time(mpd_stats));
 318         screen_song_append(labels[PLAYTIME], buf, max_label_width);
 319
 320         format_duration_long(buf, sizeof(buf),
 321                              mpd_stats_get_uptime(mpd_stats));
 322         screen_song_append(labels[UPTIME], buf, max_label_width);
 323
 324         date = g_date_new();
 325         g_date_set_time_t(date, mpd_stats_get_db_update_time(mpd_stats));
 326         g_date_strftime(buf, sizeof(buf), "%x", date);
 327         screen_song_append(labels[DBUPTIME], buf, max_label_width);
 328         g_date_free(date);
 329
 330         mpd_stats_free(mpd_stats);
 331         return true;
 332 }
 333
 334 static void
 335 screen_song_update(struct mpdclient *c)
 336 {
 337         /* Clear all lines */
 338         for (guint i = 0; i < current.lines->len; ++i)
 339                 g_free(g_ptr_array_index(current.lines, i));
 340         g_ptr_array_set_size(current.lines, 0);
 341
 342         /* If a song was selected before the song screen was opened */
 343         if (next_song != NULL) {
 344                 assert(current.selected_song == NULL);
 345                 current.selected_song = next_song;
 346                 next_song = NULL;
 347         }
 348
 349         if (current.selected_song != NULL &&
 350                         (c->song == NULL ||
 351                          strcmp(mpd_song_get_uri(current.selected_song),
 352                                 mpd_song_get_uri(c->song)) != 0 ||
 353                          c->status == NULL ||
 354                          (mpd_status_get_state(c->status) != MPD_STATE_PLAY &&
 355                           mpd_status_get_state(c->status) != MPD_STATE_PAUSE))) {
 356                 g_ptr_array_add(current.lines, g_strdup(_("Selected song")) );
 357                 screen_song_add_song(current.selected_song, c);
 358                 g_ptr_array_add(current.lines, g_strdup("\0"));
 359         }
 360
 361         if (c->song != NULL && c->status != NULL &&
 362             (mpd_status_get_state(c->status) != MPD_STATE_PLAY &&
 363              mpd_status_get_state(c->status) != MPD_STATE_PAUSE)) {
 364                 if (current.played_song != NULL) {
 365                         mpd_song_free(current.played_song);
 366                 }
 367                 current.played_song = mpd_song_dup(c->song);
 368                 g_ptr_array_add(current.lines, g_strdup(_("Currently playing song")));
 369                 screen_song_add_song(current.played_song, c);
 370                 g_ptr_array_add(current.lines, g_strdup("\0"));
 371         }
 372
 373         /* Add some statistics about mpd */
 374         if (mpdclient_is_connected(c) &&
 375             !screen_song_add_stats(mpdclient_get_connection(c)))
 376                 mpdclient_handle_error(c);
 377
 378         screen_song_repaint();
 379 }
 380
 381 static bool
 382 screen_song_cmd(struct mpdclient *c, command_t cmd)
 383 {
 384         if (list_window_scroll_cmd(lw, current.lines->len, cmd)) {
 385                 screen_song_repaint();
 386                 return true;
 387         }
 388
 389         switch(cmd) {
 390         case CMD_LOCATE:
 391                 if (current.selected_song != NULL) {
 392                         screen_file_goto_song(c, current.selected_song);
 393                         return true;
 394                 }
 395                 if (current.played_song != NULL) {
 396                         screen_file_goto_song(c, current.played_song);
 397                         return true;
 398                 }
 399
 400                 return false;
 401
 402 #ifdef ENABLE_LYRICS_SCREEN
 403         case CMD_SCREEN_LYRICS:
 404                 if (current.selected_song != NULL) {
 405                         screen_lyrics_switch(c, current.selected_song, false);
 406                         return true;
 407                 }
 408                 if (current.played_song != NULL) {
 409                         screen_lyrics_switch(c, current.played_song, true);
 410                         return true;
 411                 }
 412                 return false;
 413
 414 #endif
 415
 416         case CMD_SCREEN_SWAP:
 417                 if (current.selected_song != NULL)
 418                         screen_swap(c, current.selected_song);
 419                 else
 420                 // No need to check if this is null - we'd pass null anyway
 421                         screen_swap(c, current.played_song);
 422                 return true;
 423
 424         default:
 425                 break;
 426         }
 427
 428         if (screen_find(lw, current.lines->len,
 429                         cmd, screen_song_list_callback, NULL)) {
 430                 /* center the row */
 431                 list_window_center(lw, current.lines->len, lw->selected);
 432                 screen_song_repaint();
 433                 return true;
 434         }
 435
 436         return false;
 437 }
 438
 439 const struct screen_functions screen_song = {
 440         .init = screen_song_init,
 441         .exit = screen_song_exit,
 442         .open = screen_song_update,
 443         .close = screen_song_clear,
 444         .resize = screen_song_resize,
 445         .paint = screen_song_paint,
 446         .update = screen_song_update,
 447         .cmd = screen_song_cmd,
 448         .get_title = screen_song_title,
 449 };
 450
 451 void
 452 screen_song_switch(struct mpdclient *c, const struct mpd_song *song)
 453 {
 454         assert(song != NULL);
 455         assert(current.selected_song == NULL);
 456         assert(current.played_song == NULL);
 457
 458         next_song = mpd_song_dup(song);
 459         screen_switch(&screen_song, c);
 460 }