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_interface.h"
  21 #include "screen_file.h"
  22 #include "i18n.h"
  23 #include "screen.h"
  24 #include "screen_utils.h"
  25 #include "charset.h"
  26 #include "utils.h"
  27 #include "mpdclient.h"
  28
  29 #include <mpd/client.h>
  30
  31 #include <glib/gprintf.h>
  32 #include <assert.h>
  33 #include <string.h>
  34
  35 static list_window_t *lw;
  36
  37 static struct mpd_song *next_song;
  38
  39 static struct {
  40         struct mpd_song *selected_song;
  41         struct mpd_song *played_song;
  42         GPtrArray *lines;
  43 } current;
  44
  45 static void
  46 screen_song_clear(void)
  47 {
  48         for (guint i = 0; i < current.lines->len; ++i)
  49                 g_free(g_ptr_array_index(current.lines, i));
  50
  51         g_ptr_array_set_size(current.lines, 0);
  52
  53         if (current.selected_song != NULL) {
  54                 mpd_song_free(current.selected_song);
  55                 current.selected_song = NULL;
  56         }
  57         if (current.played_song != NULL) {
  58                 mpd_song_free(current.played_song);
  59                 current.played_song = NULL;
  60         }
  61 }
  62
  63 static void
  64 screen_song_paint(void);
  65
  66 /**
  67  * Repaint and update the screen.
  68  */
  69 static void
  70 screen_song_repaint(void)
  71 {
  72         screen_song_paint();
  73         wrefresh(lw->w);
  74 }
  75
  76 static const char *
  77 screen_song_list_callback(unsigned idx, G_GNUC_UNUSED bool *highlight,
  78                           G_GNUC_UNUSED char** sc, G_GNUC_UNUSED void *data)
  79 {
  80         static char buffer[256];
  81         char *value;
  82
  83         if (idx >= current.lines->len)
  84                 return NULL;
  85
  86         value = utf8_to_locale(g_ptr_array_index(current.lines, idx));
  87         g_strlcpy(buffer, value, sizeof(buffer));
  88         g_free(value);
  89
  90         return buffer;
  91 }
  92
  93
  94 static void
  95 screen_song_init(WINDOW *w, int cols, int rows)
  96 {
  97         /* We will need at least 10 lines, so this saves 10 reallocations :) */
  98         current.lines = g_ptr_array_sized_new(10);
  99         lw = list_window_init(w, cols, rows);
 100         lw->hide_cursor = true;
 101 }
 102
 103 static void
 104 screen_song_exit(void)
 105 {
 106         list_window_free(lw);
 107
 108         screen_song_clear();
 109
 110         g_ptr_array_free(current.lines, TRUE);
 111         current.lines = NULL;
 112 }
 113
 114 static void
 115 screen_song_resize(int cols, int rows)
 116 {
 117         lw->cols = cols;
 118         lw->rows = rows;
 119 }
 120
 121 static const char *
 122 screen_song_title(G_GNUC_UNUSED char *str, G_GNUC_UNUSED size_t size)
 123 {
 124         return _("Song viewer");
 125 }
 126
 127 static void
 128 screen_song_paint(void)
 129 {
 130         list_window_paint(lw, screen_song_list_callback, NULL);
 131 }
 132
 133 /* Appends a line with a fixed width for the label column
 134  * Handles NULL strings gracefully */
 135 static void
 136 screen_song_append(const char *label, const char *value, unsigned label_col)
 137 {
 138         int value_col, linebreaks, entry_size, label_size;
 139         int i, k;
 140         gchar *entry, *entry_iter;
 141         const gchar *value_iter;
 142
 143         assert(label != NULL);
 144         assert(g_utf8_validate(label, -1, NULL));
 145
 146         if (value != NULL) {
 147                 assert(g_utf8_validate(value, -1, NULL));
 148                 /* +2 for ': ' */
 149                 label_col += 2;
 150                 value_col = lw->cols - label_col;
 151                 /* calculate the number of required linebreaks */
 152                 linebreaks = (utf8_width(value) - 1) / value_col + 1;
 153                 value_iter = value;
 154                 label_size = strlen(label) + label_col - utf8_width(label);
 155                 entry_size = label_size + strlen(value) + 2;
 156
 157                 for (i = 0; i < linebreaks; ++i)
 158                 {
 159                         entry = g_malloc(entry_size);
 160                         if (i == 0) {
 161                                 entry_iter = entry + g_sprintf(entry, "%s: ", label);
 162                                 /* fill the label column with whitespaces */
 163                                 for ( ; entry_iter < entry + label_size; ++entry_iter)
 164                                         *entry_iter = ' ';
 165                         }
 166                         else {
 167                                 entry_iter = entry;
 168                                 /* fill the label column with whitespaces */
 169                                 for ( ; entry_iter < entry + label_col; ++entry_iter)
 170                                         *entry_iter = ' ';
 171                         }
 172                         /* skip whitespaces */
 173                         while (g_ascii_isspace(*value_iter)) ++value_iter;
 174                         k = 0;
 175                         while (value_iter && k < value_col)
 176                         {
 177                                 g_utf8_strncpy(entry_iter, value_iter, 1);
 178                                 value_iter = g_utf8_find_next_char(value_iter, NULL);
 179                                 entry_iter = g_utf8_find_next_char(entry_iter, NULL);
 180                                 ++k;
 181                         }
 182                         *entry_iter = '\0';
 183                         g_ptr_array_add(current.lines, entry);
 184                 }
 185         }
 186 }
 187
 188 static void
 189 screen_song_append_tag(const char *label, const struct mpd_song *song,
 190                        enum mpd_tag_type tag, unsigned label_col)
 191 {
 192         unsigned i = 0;
 193         const char *value;
 194
 195         while ((value = mpd_song_get_tag(song, tag, i++)) != NULL)
 196                 screen_song_append(label, value, label_col);
 197 }
 198
 199 static void
 200 screen_song_add_song(const struct mpd_song *song, const struct mpdclient *c)
 201 {
 202         unsigned i, max_label_width;
 203         enum label {
 204                 ARTIST, TITLE, ALBUM, LENGTH, COMPOSER, NAME, DISC, TRACK,
 205                 DATE, GENRE, COMMENT, BITRATE
 206         };
 207         const char *labels[] = { [ARTIST] = _("Artist"),
 208                 [TITLE] = _("Title"),
 209                 [ALBUM] = _("Album"),
 210                 [LENGTH] = _("Length"),
 211                 [COMPOSER] = _("Composer"),
 212                 [NAME] = _("Name"),
 213                 [DISC] = _("Disc"),
 214                 [TRACK] = _("Track"),
 215                 [DATE] = _("Date"),
 216                 [GENRE] = _("Genre"),
 217                 [COMMENT] = _("Comment"),
 218                 [BITRATE] = _("Bitrate"),
 219         };
 220         /* Determine the width of the longest label */
 221         max_label_width = utf8_width(labels[0]);
 222         for (i = 1; i < G_N_ELEMENTS(labels); ++i) {
 223                 if (utf8_width(labels[i]) > max_label_width)
 224                         max_label_width = utf8_width(labels[i]);
 225         }
 226
 227         assert(song != NULL);
 228
 229         screen_song_append_tag(labels[ARTIST], song, MPD_TAG_ARTIST,
 230                                max_label_width);
 231         screen_song_append_tag(labels[TITLE], song, MPD_TAG_TITLE,
 232                                max_label_width);
 233         screen_song_append_tag(labels[ALBUM], song, MPD_TAG_ALBUM,
 234                                max_label_width);
 235         /* create time string and add it */
 236         if (mpd_song_get_duration(song) > 0) {
 237                 unsigned t = mpd_song_get_duration(song);
 238                 char length[16];
 239
 240                 /*write out the time, using hours if time over 60 minutes*/
 241                 if (t > 3600) {
 242                         g_snprintf(length, sizeof(length),
 243                                         "%i:%02i:%02i",
 244                                         t/3600, (t%3600)/60, t%60);
 245                 } else {
 246                         g_snprintf(length, sizeof(length),
 247                                         "%i:%02i", t/60, t%60);
 248                 }
 249                 screen_song_append(labels[LENGTH], length, max_label_width);
 250         }
 251         screen_song_append_tag(labels[COMPOSER], song, MPD_TAG_COMPOSER,
 252                                max_label_width);
 253         screen_song_append_tag(labels[NAME], song, MPD_TAG_NAME,
 254                                max_label_width);
 255         screen_song_append_tag(labels[DISC], song, MPD_TAG_DISC,
 256                                max_label_width);
 257         screen_song_append_tag(labels[TRACK], song, MPD_TAG_TRACK,
 258                                max_label_width);
 259         screen_song_append_tag(labels[DATE], song, MPD_TAG_DATE,
 260                                max_label_width);
 261         screen_song_append_tag(labels[GENRE], song, MPD_TAG_GENRE,
 262                                max_label_width);
 263         screen_song_append_tag(labels[COMMENT], song, MPD_TAG_COMMENT,
 264                                max_label_width);
 265         screen_song_append(_("Path"), mpd_song_get_uri(song), max_label_width);
 266         if (c->status != NULL && c->song != NULL &&
 267             strcmp(mpd_song_get_uri(c->song), mpd_song_get_uri(song)) == 0 &&
 268             (mpd_status_get_state(c->status) == MPD_STATE_PLAY ||
 269              mpd_status_get_state(c->status) == MPD_STATE_PAUSE)) {
 270                 char buf[16];
 271                 g_snprintf(buf, sizeof(buf), _("%d kbps"),
 272                            mpd_status_get_kbit_rate(c->status));
 273                 screen_song_append(labels[BITRATE], buf, max_label_width);
 274         }
 275 }
 276
 277 static void
 278 screen_song_add_stats(const struct mpdclient *c)
 279 {
 280         unsigned i, max_label_width;
 281         char buf[64];
 282         char *duration;
 283         GDate *date;
 284         enum label {
 285                 ARTISTS, ALBUMS, SONGS, UPTIME,
 286                 DBUPTIME, PLAYTIME, DBPLAYTIME
 287         };
 288         const char *labels[] = { [ARTISTS] = _("Number of artists"),
 289                 [ALBUMS] = _("Number of albums"),
 290                 [SONGS] = _("Number of songs"),
 291                 [UPTIME] = _("Uptime"),
 292                 [DBUPTIME] =_("Most recent db update"),
 293                 [PLAYTIME] = _("Playtime"),
 294                 [DBPLAYTIME] = _("DB playtime")
 295         };
 296         struct mpd_stats *mpd_stats = NULL;
 297
 298         if (c->connection != NULL) {
 299                 mpd_stats = mpd_run_stats(c->connection);
 300         }
 301
 302         if (mpd_stats != NULL) {
 303                 /* Determine the width of the longest label */
 304                 max_label_width = utf8_width(labels[0]);
 305                 for (i = 1; i < G_N_ELEMENTS(labels); ++i) {
 306                         if (utf8_width(labels[i]) > max_label_width)
 307                                 max_label_width = utf8_width(labels[i]);
 308                 }
 309
 310                 g_ptr_array_add(current.lines, g_strdup(_("MPD statistics")) );
 311                 g_snprintf(buf, sizeof(buf), "%d",
 312                            mpd_stats_get_number_of_artists(mpd_stats));
 313                 screen_song_append(labels[ARTISTS], buf, max_label_width);
 314                 g_snprintf(buf, sizeof(buf), "%d",
 315                            mpd_stats_get_number_of_albums(mpd_stats));
 316                 screen_song_append(labels[ALBUMS], buf, max_label_width);
 317                 g_snprintf(buf, sizeof(buf), "%d",
 318                            mpd_stats_get_number_of_songs(mpd_stats));
 319                 screen_song_append(labels[SONGS], buf, max_label_width);
 320                 duration = time_seconds_to_durationstr(mpd_stats_get_db_play_time(mpd_stats));
 321                 screen_song_append(labels[DBPLAYTIME], duration, max_label_width);
 322                 g_free(duration);
 323                 duration = time_seconds_to_durationstr(mpd_stats_get_play_time(mpd_stats));
 324                 screen_song_append(labels[PLAYTIME], duration, max_label_width);
 325                 g_free(duration);
 326                 duration = time_seconds_to_durationstr(mpd_stats_get_uptime(mpd_stats));
 327                 screen_song_append(labels[UPTIME], duration, max_label_width);
 328                 g_free(duration);
 329                 date = g_date_new();
 330                 g_date_set_time_t(date, mpd_stats_get_db_update_time(mpd_stats));
 331                 g_date_strftime(buf, sizeof(buf), "%x", date);
 332                 screen_song_append(labels[DBUPTIME], buf, max_label_width);
 333                 g_date_free(date);
 334
 335                 mpd_stats_free(mpd_stats);
 336         }
 337 }
 338
 339 static void
 340 screen_song_update(struct mpdclient *c)
 341 {
 342         /* Clear all lines */
 343         for (guint i = 0; i < current.lines->len; ++i)
 344                 g_free(g_ptr_array_index(current.lines, i));
 345         g_ptr_array_set_size(current.lines, 0);
 346
 347         /* If a song was selected before the song screen was opened */
 348         if (next_song != NULL) {
 349                 assert(current.selected_song == NULL);
 350                 current.selected_song = next_song;
 351                 next_song = NULL;
 352         }
 353
 354         if (current.selected_song != NULL &&
 355                         (c->song == NULL ||
 356                          strcmp(mpd_song_get_uri(current.selected_song),
 357                                 mpd_song_get_uri(c->song)) != 0 ||
 358                          c->status == NULL ||
 359                          (mpd_status_get_state(c->status) != MPD_STATE_PLAY &&
 360                           mpd_status_get_state(c->status) != MPD_STATE_PAUSE))) {
 361                 g_ptr_array_add(current.lines, g_strdup(_("Selected song")) );
 362                 screen_song_add_song(current.selected_song, c);
 363                 g_ptr_array_add(current.lines, g_strdup("\0"));
 364         }
 365
 366         if (c->song != NULL && c->status != NULL &&
 367             (mpd_status_get_state(c->status) != MPD_STATE_PLAY &&
 368              mpd_status_get_state(c->status) != MPD_STATE_PAUSE)) {
 369                 if (current.played_song != NULL) {
 370                         mpd_song_free(current.played_song);
 371                 }
 372                 current.played_song = mpd_song_dup(c->song);
 373                 g_ptr_array_add(current.lines, g_strdup(_("Currently playing song")));
 374                 screen_song_add_song(current.played_song, c);
 375                 g_ptr_array_add(current.lines, g_strdup("\0"));
 376         }
 377
 378         /* Add some statistics about mpd */
 379         if (c->connection != NULL)
 380                 screen_song_add_stats(c);
 381
 382         screen_song_repaint();
 383 }
 384
 385 static bool
 386 screen_song_cmd(struct mpdclient *c, command_t cmd)
 387 {
 388         if (list_window_scroll_cmd(lw, current.lines->len, cmd)) {
 389                 screen_song_repaint();
 390                 return true;
 391         }
 392
 393         switch(cmd) {
 394         case CMD_LOCATE:
 395                 if (current.selected_song != NULL) {
 396                         screen_file_goto_song(c, current.selected_song);
 397                         return true;
 398                 }
 399                 if (current.played_song != NULL) {
 400                         screen_file_goto_song(c, current.played_song);
 401                         return true;
 402                 }
 403
 404                 return false;
 405
 406 #ifdef ENABLE_LYRICS_SCREEN
 407         case CMD_SCREEN_LYRICS:
 408                 if (current.selected_song != NULL) {
 409                         screen_lyrics_switch(c, current.selected_song, false);
 410                         return true;
 411                 }
 412                 if (current.played_song != NULL) {
 413                         screen_lyrics_switch(c, current.played_song, true);
 414                         return true;
 415                 }
 416                 return false;
 417
 418 #endif
 419
 420         case CMD_SCREEN_SWAP:
 421                 if (current.selected_song != NULL)
 422                         screen_swap(c, current.selected_song);
 423                 else
 424                 // No need to check if this is null - we'd pass null anyway
 425                         screen_swap(c, current.played_song);
 426                 return true;
 427
 428         default:
 429                 break;
 430         }
 431
 432         if (screen_find(lw, current.lines->len,
 433                         cmd, screen_song_list_callback, NULL)) {
 434                 /* center the row */
 435                 list_window_center(lw, current.lines->len, lw->selected);
 436                 screen_song_repaint();
 437                 return true;
 438         }
 439
 440         return false;
 441 }
 442
 443 const struct screen_functions screen_song = {
 444         .init = screen_song_init,
 445         .exit = screen_song_exit,
 446         .open = screen_song_update,
 447         .close = screen_song_clear,
 448         .resize = screen_song_resize,
 449         .paint = screen_song_paint,
 450         .update = screen_song_update,
 451         .cmd = screen_song_cmd,
 452         .get_title = screen_song_title,
 453 };
 454
 455 void
 456 screen_song_switch(struct mpdclient *c, const struct mpd_song *song)
 457 {
 458         assert(song != NULL);
 459         assert(current.selected_song == NULL);
 460         assert(current.played_song == NULL);
 461
 462         next_song = mpd_song_dup(song);
 463         screen_switch(&screen_song, c);
 464 }