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