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