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 "i18n.h"
  21 #include "screen.h"
  22 #include "screen_utils.h"
  23 #include "charset.h"
  24 #include "utils.h"
  25
  26 #include <glib/gprintf.h>
  27 #include <string.h>
  28
  29 static list_window_t *lw;
  30
  31 static const struct mpd_song *next_song;
  32
  33 static struct {
  34         struct mpd_song *selected_song;
  35         struct mpd_song *played_song;
  36         GPtrArray *lines;
  37 } current;
  38
  39 static void
  40 screen_song_clear(void)
  41 {
  42         for (guint i = 0; i < current.lines->len; ++i)
  43                 g_free(g_ptr_array_index(current.lines, i));
  44
  45         g_ptr_array_set_size(current.lines, 0);
  46
  47         if (current.selected_song != NULL) {
  48                 mpd_freeSong(current.selected_song);
  49                 current.selected_song = NULL;
  50         }
  51         if (current.played_song != NULL) {
  52                 mpd_freeSong(current.played_song);
  53                 current.played_song = NULL;
  54         }
  55 }
  56
  57 static void
  58 screen_song_paint(void);
  59
  60 /**
  61  * Repaint and update the screen.
  62  */
  63 static void
  64 screen_song_repaint(void)
  65 {
  66         screen_song_paint();
  67         wrefresh(lw->w);
  68 }
  69
  70 static const char *
  71 screen_song_list_callback(unsigned idx, G_GNUC_UNUSED bool *highlight,
  72                           G_GNUC_UNUSED void *data)
  73 {
  74         static char buffer[256];
  75         char *value;
  76
  77         if (idx >= current.lines->len)
  78                 return NULL;
  79
  80         value = utf8_to_locale(g_ptr_array_index(current.lines, idx));
  81         g_strlcpy(buffer, value, sizeof(buffer));
  82         g_free(value);
  83
  84         return buffer;
  85 }
  86
  87
  88 static void
  89 screen_song_init(WINDOW *w, int cols, int rows)
  90 {
  91         /* We will need at least 10 lines, so this saves 10 reallocations :) */
  92         current.lines = g_ptr_array_sized_new(10);
  93         lw = list_window_init(w, cols, rows);
  94         lw->hide_cursor = true;
  95 }
  96
  97 static void
  98 screen_song_exit(void)
  99 {
 100         list_window_free(lw);
 101
 102         screen_song_clear();
 103
 104         g_ptr_array_free(current.lines, TRUE);
 105         current.lines = NULL;
 106 }
 107
 108 static void
 109 screen_song_resize(int cols, int rows)
 110 {
 111         lw->cols = cols;
 112         lw->rows = rows;
 113 }
 114
 115 static const char *
 116 screen_song_title(G_GNUC_UNUSED char *str, G_GNUC_UNUSED size_t size)
 117 {
 118         return _("Song viewer");
 119 }
 120
 121 static void
 122 screen_song_paint(void)
 123 {
 124         list_window_paint(lw, screen_song_list_callback, NULL);
 125 }
 126
 127 /* Appends a line with a fixed width for the label column
 128  * Handles NULL strings gracefully */
 129 static void
 130 screen_song_append(const char *label, const char *value, unsigned label_col)
 131 {
 132         int value_col, linebreaks, entry_size, label_size;
 133         int i, k;
 134         gchar *entry, *entry_iter;
 135         const gchar *value_iter;
 136
 137         assert(label != NULL);
 138         assert(g_utf8_validate(label, -1, NULL));
 139
 140         if (value != NULL) {
 141                 assert(g_utf8_validate(value, -1, NULL));
 142                 /* +2 for ': ' */
 143                 label_col += 2;
 144                 value_col = lw->cols - label_col;
 145                 /* calculate the number of required linebreaks */
 146                 linebreaks = (utf8_width(value) - 1) / value_col + 1;
 147                 value_iter = value;
 148                 label_size = strlen(label) + label_col - utf8_width(label);
 149                 entry_size = label_size + strlen(value) + 2;
 150
 151                 for (i = 0; i < linebreaks; ++i)
 152                 {
 153                         entry = g_malloc(entry_size);
 154                         if (i == 0) {
 155                                 entry_iter = entry + g_sprintf(entry, "%s: ", label);
 156                                 /* fill the label column with whitespaces */
 157                                 for ( ; entry_iter < entry + label_size; ++entry_iter)
 158                                         *entry_iter = ' ';
 159                         }
 160                         else {
 161                                 entry_iter = entry;
 162                                 /* fill the label column with whitespaces */
 163                                 for ( ; entry_iter < entry + label_col; ++entry_iter)
 164                                         *entry_iter = ' ';
 165                         }
 166                         /* skip whitespaces */
 167                         while (g_ascii_isspace(*value_iter)) ++value_iter;
 168                         k = 0;
 169                         while (value_iter && k < value_col)
 170                         {
 171                                 g_utf8_strncpy(entry_iter, value_iter, 1);
 172                                 value_iter = g_utf8_find_next_char(value_iter, NULL);
 173                                 entry_iter = g_utf8_find_next_char(entry_iter, NULL);
 174                                 ++k;
 175                         }
 176                         *entry_iter = '\0';
 177                         g_ptr_array_add(current.lines, entry);
 178                 }
 179         }
 180 }
 181
 182 static void
 183 screen_song_add_song(const struct mpd_song *song, const mpdclient_t *c)
 184 {
 185         unsigned i, max_label_width;
 186         enum label {
 187                 ARTIST, TITLE, ALBUM, COMPOSER, NAME, DISC, TRACK,
 188                 DATE, GENRE, COMMENT, PATH, BITRATE
 189         };
 190         const char *labels[] = { [ARTIST] = _("Artist"),
 191                 [TITLE] = _("Title"),
 192                 [ALBUM] = _("Album"),
 193                 [COMPOSER] = _("Composer"),
 194                 [NAME] = _("Name"),
 195                 [DISC] = _("Disc"),
 196                 [TRACK] = _("Track"),
 197                 [DATE] = _("Date"),
 198                 [GENRE] = _("Genre"),
 199                 [COMMENT] = _("Comment"),
 200                 [PATH] = _("Path"),
 201                 [BITRATE] = _("Bitrate"),
 202         };
 203         /* Determine the width of the longest label */
 204         max_label_width = utf8_width(labels[0]);
 205         for (i = 1; i < G_N_ELEMENTS(labels); ++i) {
 206                 if (utf8_width(labels[i]) > max_label_width)
 207                         max_label_width = utf8_width(labels[i]);
 208         }
 209
 210         assert(song != NULL);
 211
 212         screen_song_append(labels[ARTIST], song->artist, max_label_width);
 213         screen_song_append(labels[TITLE], song->title, max_label_width);
 214         screen_song_append(labels[ALBUM], song->album, max_label_width);
 215         screen_song_append(labels[COMPOSER], song->composer, max_label_width);
 216         screen_song_append(labels[NAME], song->name, max_label_width);
 217         screen_song_append(labels[DISC], song->disc, max_label_width);
 218         screen_song_append(labels[TRACK], song->track, max_label_width);
 219         screen_song_append(labels[DATE], song->date, max_label_width);
 220         screen_song_append(labels[GENRE], song->genre, max_label_width);
 221         screen_song_append(labels[COMMENT], song->comment, max_label_width);
 222         screen_song_append(labels[PATH], song->file, max_label_width);
 223         if (c->status != NULL && c->song != NULL &&
 224                          g_strcmp0(c->song->file, song->file) == 0 &&
 225                         (c->status->state == MPD_STATUS_STATE_PLAY ||
 226                          c->status->state == MPD_STATUS_STATE_PAUSE) ) {
 227                 char buf[16];
 228                 g_snprintf(buf, sizeof(buf), _("%d kbps"), c->status->bitRate);
 229                 screen_song_append(labels[BITRATE], buf, max_label_width);
 230         }
 231 }
 232
 233 static void
 234 screen_song_add_stats(const mpdclient_t *c)
 235 {
 236         unsigned i, max_label_width;
 237         char buf[64];
 238         char *duration;
 239         GDate *date;
 240         enum label {
 241                 ARTISTS, ALBUMS, SONGS, UPTIME,
 242                 DBUPTIME, PLAYTIME, DBPLAYTIME
 243         };
 244         const char *labels[] = { [ARTISTS] = _("Number of artists"),
 245                 [ALBUMS] = _("Number of albums"),
 246                 [SONGS] = _("Number of songs"),
 247                 [UPTIME] = _("Uptime"),
 248                 [DBUPTIME] =_("DB last updated"),
 249                 [PLAYTIME] = _("Playtime"),
 250                 [DBPLAYTIME] = _("DB playtime")
 251         };
 252         mpd_Stats *mpd_stats = NULL;
 253         if (c->connection != NULL) {
 254                 mpd_sendStatsCommand(c->connection);
 255                 mpd_stats = mpd_getStats(c->connection);
 256         }
 257
 258         if (mpd_stats != NULL) {
 259                 /* Determine the width of the longest label */
 260                 max_label_width = utf8_width(labels[0]);
 261                 for (i = 1; i < G_N_ELEMENTS(labels); ++i) {
 262                         if (utf8_width(labels[i]) > max_label_width)
 263                                 max_label_width = utf8_width(labels[i]);
 264                 }
 265
 266                 g_ptr_array_add(current.lines, g_strdup(_("MPD statistics")) );
 267                 g_snprintf(buf, sizeof(buf), "%d", mpd_stats->numberOfArtists);
 268                 screen_song_append(labels[ARTISTS], buf, max_label_width);
 269                 g_snprintf(buf, sizeof(buf), "%d", mpd_stats->numberOfAlbums);
 270                 screen_song_append(labels[ALBUMS], buf, max_label_width);
 271                 g_snprintf(buf, sizeof(buf), "%d", mpd_stats->numberOfSongs);
 272                 screen_song_append(labels[SONGS], buf, max_label_width);
 273                 duration = time_seconds_to_durationstr(mpd_stats->dbPlayTime);
 274                 screen_song_append(labels[DBPLAYTIME], duration, max_label_width);
 275                 g_free(duration);
 276                 duration = time_seconds_to_durationstr(mpd_stats->playTime);
 277                 screen_song_append(labels[PLAYTIME], duration, max_label_width);
 278                 g_free(duration);
 279                 duration = time_seconds_to_durationstr(mpd_stats->uptime);
 280                 screen_song_append(labels[UPTIME], duration, max_label_width);
 281                 g_free(duration);
 282                 date = g_date_new();
 283                 g_date_set_time_t(date, mpd_stats->dbUpdateTime);
 284                 g_date_strftime(buf, sizeof(buf), "%x", date);
 285                 screen_song_append(labels[DBUPTIME], buf, max_label_width);
 286                 g_date_free(date);
 287         }
 288 }
 289
 290 static void
 291 screen_song_update(mpdclient_t *c)
 292 {
 293         /* Clear all lines */
 294         for (guint i = 0; i < current.lines->len; ++i)
 295                 g_free(g_ptr_array_index(current.lines, i));
 296         g_ptr_array_set_size(current.lines, 0);
 297
 298         /* If a song was selected before the song screen was opened */
 299         if (next_song != NULL) {
 300                 assert(current.selected_song == NULL);
 301                 current.selected_song = mpd_songDup(next_song);
 302                 next_song = NULL;
 303         }
 304
 305         if (current.selected_song != NULL &&
 306                         (c->song == NULL ||
 307                          g_strcmp0(current.selected_song->file, c->song->file) != 0 ||
 308                          c->status == NULL ||
 309                         (c->status->state != MPD_STATUS_STATE_PLAY &&
 310                          c->status->state != MPD_STATUS_STATE_PAUSE)) ) {
 311                 g_ptr_array_add(current.lines, g_strdup(_("Selected song")) );
 312                 screen_song_add_song(current.selected_song, c);
 313                 g_ptr_array_add(current.lines, g_strdup("\0"));
 314         }
 315
 316         if (c->song != NULL && c->status != NULL &&
 317                         (c->status->state == MPD_STATUS_STATE_PLAY ||
 318                          c->status->state == MPD_STATUS_STATE_PAUSE) ) {
 319                 if (current.played_song != NULL) {
 320                         mpd_freeSong(current.played_song);
 321                 }
 322                 current.played_song = mpd_songDup(c->song);
 323                 g_ptr_array_add(current.lines, g_strdup(_("Currently playing song")));
 324                 screen_song_add_song(current.played_song, c);
 325                 g_ptr_array_add(current.lines, g_strdup("\0"));
 326         }
 327
 328         /* Add some statistics about mpd */
 329         if (c->connection != NULL)
 330                 screen_song_add_stats(c);
 331
 332         screen_song_repaint();
 333 }
 334
 335 static bool
 336 screen_song_cmd(mpdclient_t *c, command_t cmd)
 337 {
 338         if (list_window_scroll_cmd(lw, current.lines->len, cmd)) {
 339                 screen_song_repaint();
 340                 return true;
 341         }
 342
 343         switch(cmd) {
 344         case CMD_LOCATE:
 345                 if (current.selected_song != NULL) {
 346                         screen_file_goto_song(c, current.selected_song);
 347                         return true;
 348                 }
 349                 if (current.played_song != NULL) {
 350                         screen_file_goto_song(c, current.played_song);
 351                         return true;
 352                 }
 353
 354                 return false;
 355
 356 #ifdef ENABLE_LYRICS_SCREEN
 357         case CMD_SCREEN_LYRICS:
 358                 if (current.selected_song != NULL) {
 359                         screen_lyrics_switch(c, current.selected_song);
 360                         return true;
 361                 }
 362                 if (current.played_song != NULL) {
 363                         screen_lyrics_switch(c, current.played_song);
 364                         return true;
 365                 }
 366                 return false;
 367
 368 #endif
 369
 370         case CMD_SCREEN_SWAP:
 371                 if (current.selected_song != NULL)
 372                         screen_swap(c, current.selected_song);
 373                 else
 374                 // No need to check if this is null - we'd pass null anyway
 375                         screen_swap(c, current.played_song);
 376                 return true;
 377
 378         default:
 379                 break;
 380         }
 381
 382         if (screen_find(lw, current.lines->len,
 383                         cmd, screen_song_list_callback, NULL)) {
 384                 /* center the row */
 385                 list_window_center(lw, current.lines->len, lw->selected);
 386                 screen_song_repaint();
 387                 return true;
 388         }
 389
 390         return false;
 391 }
 392
 393 const struct screen_functions screen_song = {
 394         .init = screen_song_init,
 395         .exit = screen_song_exit,
 396         .open = screen_song_update,
 397         .close = screen_song_clear,
 398         .resize = screen_song_resize,
 399         .paint = screen_song_paint,
 400         .update = screen_song_update,
 401         .cmd = screen_song_cmd,
 402         .get_title = screen_song_title,
 403 };
 404
 405 void
 406 screen_song_switch(mpdclient_t *c, const struct mpd_song *song)
 407 {
 408         assert(song != NULL);
 409         assert(current.selected_song == NULL);
 410         assert(current.played_song == NULL);
 411
 412         next_song = song;
 413         screen_switch(&screen_song, c);
 414 }